78211674258 has 16 divisors (see below), whose sum is σ = 160651007040. Its totient is φ = 25365948336.

The previous prime is 78211674241. The next prime is 78211674263. The reversal of 78211674258 is 85247611287.

It is a happy number.

It is a super-2 number, since 2×78211674258² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78211674258.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176152198 + ... + 176152641.

It is an arithmetic number, because the mean of its divisors is an integer number (10040687940).

Almost surely, 2^78211674258 is an apocalyptic number.

78211674258 is an abundant number, since it is smaller than the sum of its proper divisors (82439332782).

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

78211674258 is a wasteful number, since it uses less digits than its factorization.

78211674258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352304881.

The product of its digits is 1505280, while the sum is 51.

The spelling of 78211674258 in words is "seventy-eight billion, two hundred eleven million, six hundred seventy-four thousand, two hundred fifty-eight".