252978897660 has 48 divisors (see below), whose sum is σ = 708367736832. Its totient is φ = 67458484800.

The previous prime is 252978897643. The next prime is 252978897673. The reversal of 252978897660 is 66798879252.

It is a super-2 number, since 2×252978897660² (a number of 24 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 15 ways as a sum of consecutive naturals, for example, 1940325 + ... + 2066595.

It is an arithmetic number, because the mean of its divisors is an integer number (14757661184).

Almost surely, 2^252978897660 is an apocalyptic number.

252978897660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252978897660 is an abundant number, since it is smaller than the sum of its proper divisors (455388839172).

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

252978897660 is a wasteful number, since it uses less digits than its factorization.

252978897660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159674 (or 159672 counting only the distinct ones).

The product of its (nonzero) digits is 182891520, while the sum is 69.

The spelling of 252978897660 in words is "two hundred fifty-two billion, nine hundred seventy-eight million, eight hundred ninety-seven thousand, six hundred sixty".