394657242525 has 144 divisors (see below), whose sum is σ = 871086885760. Its totient is φ = 166328640000.

The previous prime is 394657242503. The next prime is 394657242527. The reversal of 394657242525 is 525242756493.

394657242525 is a `hidden beast` number, since 3 + 9 + 4 + 6 + 5 + 72 + 42 + 525 = 666.

It is not a de Polignac number, because 394657242525 - 2⁵ = 394657242493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394657242527) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16962150 + ... + 16985400.

Almost surely, 2^394657242525 is an apocalyptic number.

394657242525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

394657242525 is an abundant number, since it is smaller than the sum of its proper divisors (476429643235).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394657242525 is a wasteful number, since it uses less digits than its factorization.

394657242525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24116 (or 24108 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 54.

The spelling of 394657242525 in words is "three hundred ninety-four billion, six hundred fifty-seven million, two hundred forty-two thousand, five hundred twenty-five".