258505756940 has 24 divisors (see below), whose sum is σ = 548236966032. Its totient is φ = 102378516800.

The previous prime is 258505756937. The next prime is 258505756967. The reversal of 258505756940 is 49657505852.

It is a super-2 number, since 2×258505756940² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63984554 + ... + 63988593.

It is an arithmetic number, because the mean of its divisors is an integer number (22843206918).

Almost surely, 2^258505756940 is an apocalyptic number.

258505756940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258505756940 is an abundant number, since it is smaller than the sum of its proper divisors (289731209092).

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

258505756940 is a wasteful number, since it uses less digits than its factorization.

258505756940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127973257 (or 127973255 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 56.

The spelling of 258505756940 in words is "two hundred fifty-eight billion, five hundred five million, seven hundred fifty-six thousand, nine hundred forty".