61465256415 has 48 divisors (see below), whose sum is σ = 107581874400. Its totient is φ = 32461191936.

The previous prime is 61465256399. The next prime is 61465256431. The reversal of 61465256415 is 51465256416.

61465256415 is a `hidden beast` number, since 6 + 14 + 65 + 2 + 564 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (61465256399) and next prime (61465256431).

It is not a de Polignac number, because 61465256415 - 2⁴ = 61465256399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12147156 + ... + 12152214.

It is an arithmetic number, because the mean of its divisors is an integer number (2241289050).

Almost surely, 2^61465256415 is an apocalyptic number.

61465256415 is a deficient number, since it is larger than the sum of its proper divisors (46116617985).

61465256415 is a wasteful number, since it uses less digits than its factorization.

61465256415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7656 (or 7653 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

Subtracting from 61465256415 its reverse (51465256416), we obtain a palindrome (9999999999).

The spelling of 61465256415 in words is "sixty-one billion, four hundred sixty-five million, two hundred fifty-six thousand, four hundred fifteen".