78311888842 has 16 divisors (see below), whose sum is σ = 129155761152. Its totient is φ = 35316025920.

The previous prime is 78311888833. The next prime is 78311888861. The reversal of 78311888842 is 24888811387.

It is a super-2 number, since 2×78311888842² (a number of 23 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, 14011503 + ... + 14017090.

It is an arithmetic number, because the mean of its divisors is an integer number (8072235072).

Almost surely, 2^78311888842 is an apocalyptic number.

78311888842 is a deficient number, since it is larger than the sum of its proper divisors (50843872310).

78311888842 is a wasteful number, since it uses less digits than its factorization.

78311888842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28028733.

The product of its digits is 5505024, while the sum is 58.

The spelling of 78311888842 in words is "seventy-eight billion, three hundred eleven million, eight hundred eighty-eight thousand, eight hundred forty-two".