385557406525 has 12 divisors (see below), whose sum is σ = 488263338432. Its totient is φ = 301883245040.

The previous prime is 385557406489. The next prime is 385557406537. The reversal of 385557406525 is 525604755583.

It is not a de Polignac number, because 385557406525 - 2²⁷ = 385423188797 is a prime.

It is a super-2 number, since 2×385557406525² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164065807 + ... + 164068156.

It is an arithmetic number, because the mean of its divisors is an integer number (40688611536).

Almost surely, 2^385557406525 is an apocalyptic number.

It is an amenable number.

385557406525 is a deficient number, since it is larger than the sum of its proper divisors (102705931907).

385557406525 is a wasteful number, since it uses less digits than its factorization.

385557406525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328134020 (or 328134015 counting only the distinct ones).

The product of its (nonzero) digits is 25200000, while the sum is 55.

The spelling of 385557406525 in words is "three hundred eighty-five billion, five hundred fifty-seven million, four hundred six thousand, five hundred twenty-five".