258687772278 has 16 divisors (see below), whose sum is σ = 557173663536. Its totient is φ = 79596237600.

The previous prime is 258687772241. The next prime is 258687772279. The reversal of 258687772278 is 872277786852.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258687772279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1658254873 + ... + 1658255028.

It is an arithmetic number, because the mean of its divisors is an integer number (34823353971).

Almost surely, 2^258687772278 is an apocalyptic number.

258687772278 is an abundant number, since it is smaller than the sum of its proper divisors (298485891258).

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

258687772278 is a wasteful number, since it uses less digits than its factorization.

258687772278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316509919.

The product of its digits is 295034880, while the sum is 69.

The spelling of 258687772278 in words is "two hundred fifty-eight billion, six hundred eighty-seven million, seven hundred seventy-two thousand, two hundred seventy-eight".