78158311432 has 16 divisors (see below), whose sum is σ = 146677346640. Its totient is φ = 39044352336.

The previous prime is 78158311411. The next prime is 78158311453. The reversal of 78158311432 is 23411385187.

It is an interprime number because it is at equal distance from previous prime (78158311411) and next prime (78158311453).

It is a super-2 number, since 2×78158311432² (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 3 ways as a sum of consecutive naturals, for example, 4340878 + ... + 4358845.

It is an arithmetic number, because the mean of its divisors is an integer number (9167334165).

Almost surely, 2^78158311432 is an apocalyptic number.

It is an amenable number.

78158311432 is a deficient number, since it is larger than the sum of its proper divisors (68519035208).

78158311432 is a wasteful number, since it uses less digits than its factorization.

78158311432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8700852 (or 8700848 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The spelling of 78158311432 in words is "seventy-eight billion, one hundred fifty-eight million, three hundred eleven thousand, four hundred thirty-two".