31339621698 has 48 divisors (see below), whose sum is σ = 78737574720. Its totient is φ = 8140160160.

The previous prime is 31339621657. The next prime is 31339621723. The reversal of 31339621698 is 89612693313.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31339621698.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3078313 + ... + 3088476.

It is an arithmetic number, because the mean of its divisors is an integer number (1640366140).

Almost surely, 2^31339621698 is an apocalyptic number.

31339621698 is an abundant number, since it is smaller than the sum of its proper divisors (47397953022).

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

31339621698 is a wasteful number, since it uses less digits than its factorization.

31339621698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6166823 (or 6166812 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 51.

The spelling of 31339621698 in words is "thirty-one billion, three hundred thirty-nine million, six hundred twenty-one thousand, six hundred ninety-eight".