11555625465 has 12 divisors (see below), whose sum is σ = 20029750884. Its totient is φ = 6163000224.

The previous prime is 11555625461. The next prime is 11555625469. The reversal of 11555625465 is 56452655511.

It is a happy number.

11555625465 is a `hidden beast` number, since 1 + 1 + 55 + 56 + 2 + 546 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (11555625461) and next prime (11555625469).

It can be written as a sum of positive squares in 2 ways, for example, as 2926701801 + 8628923664 = 54099^2 + 92892^2 .

It is not a de Polignac number, because 11555625465 - 2² = 11555625461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 256791677 = 11555625465 / (1 + 1 + 5 + 5 + 5 + 6 + 2 + 5 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 11555625465.

It is not an unprimeable number, because it can be changed into a prime (11555625461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128395794 + ... + 128395883.

It is an arithmetic number, because the mean of its divisors is an integer number (1669145907).

Almost surely, 2^11555625465 is an apocalyptic number.

11555625465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11555625465 is a deficient number, since it is larger than the sum of its proper divisors (8474125419).

11555625465 is a wasteful number, since it uses less digits than its factorization.

11555625465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256791688 (or 256791685 counting only the distinct ones).

The product of its digits is 900000, while the sum is 45.

The spelling of 11555625465 in words is "eleven billion, five hundred fifty-five million, six hundred twenty-five thousand, four hundred sixty-five".