78438700734 has 16 divisors (see below), whose sum is σ = 158863192320. Its totient is φ = 25815268440.

The previous prime is 78438700643. The next prime is 78438700751. The reversal of 78438700734 is 43700783487.

It is a congruent 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, 82740772 + ... + 82741719.

It is an arithmetic number, because the mean of its divisors is an integer number (9928949520).

Almost surely, 2^78438700734 is an apocalyptic number.

78438700734 is an abundant number, since it is smaller than the sum of its proper divisors (80424491586).

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

78438700734 is a wasteful number, since it uses less digits than its factorization.

78438700734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165482575.

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 78438700734 in words is "seventy-eight billion, four hundred thirty-eight million, seven hundred thousand, seven hundred thirty-four".