31499498971623 has 16 divisors (see below), whose sum is σ = 42688128943616. Its totient is φ = 20655272060640.

The previous prime is 31499498971609. The next prime is 31499498971631. The reversal of 31499498971623 is 32617989499413.

It is not a de Polignac number, because 31499498971623 - 2¹² = 31499498967527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31499498970623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32195790 + ... + 33159732.

It is an arithmetic number, because the mean of its divisors is an integer number (2668008058976).

Almost surely, 2^{31499498971623} is an apocalyptic number.

31499498971623 is a deficient number, since it is larger than the sum of its proper divisors (11188629971993).

31499498971623 is a wasteful number, since it uses less digits than its factorization.

31499498971623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142574.

The product of its digits is 634894848, while the sum is 75.

The spelling of 31499498971623 in words is "thirty-one trillion, four hundred ninety-nine billion, four hundred ninety-eight million, nine hundred seventy-one thousand, six hundred twenty-three".