64145488725 has 36 divisors (see below), whose sum is σ = 116465586276. Its totient is φ = 33742275840.

The previous prime is 64145488717. The next prime is 64145488753. The reversal of 64145488725 is 52788454146.

64145488725 is a `hidden beast` number, since 6 + 4 + 14 + 548 + 87 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6380676 + 64139108049 = 2526^2 + 253257^2 .

It is not a de Polignac number, because 64145488725 - 2³ = 64145488717 is a prime.

It is a super-2 number, since 2×64145488725² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1936254 + ... + 1969103.

Almost surely, 2^64145488725 is an apocalyptic number.

It is an amenable number.

64145488725 is a deficient number, since it is larger than the sum of its proper divisors (52320097551).

64145488725 is a wasteful number, since it uses less digits than its factorization.

64145488725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905446 (or 3905438 counting only the distinct ones).

The product of its digits is 8601600, while the sum is 54.

The spelling of 64145488725 in words is "sixty-four billion, one hundred forty-five million, four hundred eighty-eight thousand, seven hundred twenty-five".