78088851018 has 12 divisors (see below), whose sum is σ = 169192510578. Its totient is φ = 26029617000.

The previous prime is 78088851017. The next prime is 78088851047. The reversal of 78088851018 is 81015888087.

It can be written as a sum of positive squares in only one way, i.e., 74743732449 + 3345118569 = 273393^2 + 57837^2 .

It is a super-2 number, since 2×78088851018² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78088851017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2169134733 + ... + 2169134768.

Almost surely, 2^78088851018 is an apocalyptic number.

78088851018 is an abundant number, since it is smaller than the sum of its proper divisors (91103659560).

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

78088851018 is a wasteful number, since it uses less digits than its factorization.

78088851018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338269509 (or 4338269506 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 54.

The spelling of 78088851018 in words is "seventy-eight billion, eighty-eight million, eight hundred fifty-one thousand, eighteen".