64673632525 has 24 divisors (see below), whose sum is σ = 85482642600. Its totient is φ = 48368578560.

The previous prime is 64673632523. The next prime is 64673632531. The reversal of 64673632525 is 52523637646.

64673632525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 22846020201 + 41827612324 = 151149^2 + 204518^2 .

It is not a de Polignac number, because 64673632525 - 2¹ = 64673632523 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64673632523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447324 + ... + 573973.

It is an arithmetic number, because the mean of its divisors is an integer number (3561776775).

Almost surely, 2^64673632525 is an apocalyptic number.

It is an amenable number.

64673632525 is a deficient number, since it is larger than the sum of its proper divisors (20809010075).

64673632525 is a wasteful number, since it uses less digits than its factorization.

64673632525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021473 (or 1021468 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 49.

The spelling of 64673632525 in words is "sixty-four billion, six hundred seventy-three million, six hundred thirty-two thousand, five hundred twenty-five".