76721791398 has 16 divisors (see below), whose sum is σ = 175364094720. Its totient is φ = 21920511816.

The previous prime is 76721791387. The next prime is 76721791417. The reversal of 76721791398 is 89319712767.

It is a Curzon number.

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, 913354618 + ... + 913354701.

It is an arithmetic number, because the mean of its divisors is an integer number (10960255920).

Almost surely, 2^76721791398 is an apocalyptic number.

76721791398 is an abundant number, since it is smaller than the sum of its proper divisors (98642303322).

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

76721791398 is a wasteful number, since it uses less digits than its factorization.

76721791398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826709331.

The product of its digits is 8001504, while the sum is 60.

The spelling of 76721791398 in words is "seventy-six billion, seven hundred twenty-one million, seven hundred ninety-one thousand, three hundred ninety-eight".