31126891609478 has 32 divisors (see below), whose sum is σ = 55344525557760. Its totient is φ = 12846463529760.

The previous prime is 31126891609469. The next prime is 31126891609493. The reversal of 31126891609478 is 87490619862113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99932258 + ... + 100243253.

It is an arithmetic number, because the mean of its divisors is an integer number (1729516423680).

Almost surely, 2^{31126891609478} is an apocalyptic number.

31126891609478 is a deficient number, since it is larger than the sum of its proper divisors (24217633948282).

31126891609478 is a wasteful number, since it uses less digits than its factorization.

31126891609478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200175932.

The product of its (nonzero) digits is 31352832, while the sum is 65.

The spelling of 31126891609478 in words is "thirty-one trillion, one hundred twenty-six billion, eight hundred ninety-one million, six hundred nine thousand, four hundred seventy-eight".