258188883978 has 64 divisors (see below), whose sum is σ = 523810022400. Its totient is φ = 84835172352.

The previous prime is 258188883977. The next prime is 258188884007. The reversal of 258188883978 is 879388881852.

258188883978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×258188883978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (258188883977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82302826 + ... + 82305962.

It is an arithmetic number, because the mean of its divisors is an integer number (8184531600).

Almost surely, 2^258188883978 is an apocalyptic number.

258188883978 is an abundant number, since it is smaller than the sum of its proper divisors (265621138422).

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

258188883978 is a wasteful number, since it uses less digits than its factorization.

258188883978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 495452160, while the sum is 75.

The spelling of 258188883978 in words is "two hundred fifty-eight billion, one hundred eighty-eight million, eight hundred eighty-three thousand, nine hundred seventy-eight".