31490947895 has 16 divisors (see below), whose sum is σ = 42646050720. Its totient is φ = 22112764800.

The previous prime is 31490947889. The next prime is 31490947907. The reversal of 31490947895 is 59874909413.

It is not a de Polignac number, because 31490947895 - 2⁸ = 31490947639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9870176 + ... + 9873365.

It is an arithmetic number, because the mean of its divisors is an integer number (2665378170).

Almost surely, 2^31490947895 is an apocalyptic number.

31490947895 is a deficient number, since it is larger than the sum of its proper divisors (11155102825).

31490947895 is a wasteful number, since it uses less digits than its factorization.

31490947895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19743586.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 31490947895 in words is "thirty-one billion, four hundred ninety million, nine hundred forty-seven thousand, eight hundred ninety-five".