78894376738 has 16 divisors (see below), whose sum is σ = 120854249856. Its totient is φ = 38613081520.

The previous prime is 78894376727. The next prime is 78894376777. The reversal of 78894376738 is 83767349887.

It is a happy number.

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, 817756 + ... + 909127.

It is an arithmetic number, because the mean of its divisors is an integer number (7553390616).

Almost surely, 2^78894376738 is an apocalyptic number.

78894376738 is a deficient number, since it is larger than the sum of its proper divisors (41959873118).

78894376738 is a wasteful number, since it uses less digits than its factorization.

78894376738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727369.

The product of its digits is 341397504, while the sum is 70.

The spelling of 78894376738 in words is "seventy-eight billion, eight hundred ninety-four million, three hundred seventy-six thousand, seven hundred thirty-eight".