64364145525 has 18 divisors (see below), whose sum is σ = 115283336610. Its totient is φ = 34327544160.

The previous prime is 64364145523. The next prime is 64364145581. The reversal of 64364145525 is 52554146346.

64364145525 is a `hidden beast` number, since 6 + 43 + 6 + 41 + 45 + 525 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 17981200836 + 46382944689 = 134094^2 + 215367^2 .

It is not a de Polignac number, because 64364145525 - 2¹ = 64364145523 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64364145523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 143031210 + ... + 143031659.

Almost surely, 2^64364145525 is an apocalyptic number.

It is an amenable number.

64364145525 is a deficient number, since it is larger than the sum of its proper divisors (50919191085).

64364145525 is a wasteful number, since it uses less digits than its factorization.

64364145525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286062885 (or 286062877 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 64364145525 in words is "sixty-four billion, three hundred sixty-four million, one hundred forty-five thousand, five hundred twenty-five".