399525370752 has 32 divisors (see below), whose sum is σ = 1061239267080. Its totient is φ = 133175123456.

The previous prime is 399525370733. The next prime is 399525370757. The reversal of 399525370752 is 257073525993.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 399525370692 and 399525370701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399525370757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520214943 + ... + 520215710.

Almost surely, 2^399525370752 is an apocalyptic number.

399525370752 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399525370752 is an abundant number, since it is smaller than the sum of its proper divisors (661713896328).

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

399525370752 is a wasteful number, since it uses less digits than its factorization.

399525370752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040430670 (or 1040430658 counting only the distinct ones).

The product of its (nonzero) digits is 17860500, while the sum is 57.

The spelling of 399525370752 in words is "three hundred ninety-nine billion, five hundred twenty-five million, three hundred seventy thousand, seven hundred fifty-two".