31621793279 has 8 divisors (see below), whose sum is σ = 33528479040. Its totient is φ = 29720283136.

The previous prime is 31621793267. The next prime is 31621793297. The reversal of 31621793279 is 97239712613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31621793279 - 2¹⁶ = 31621727743 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 (31621793299) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1281314 + ... + 1305759.

It is an arithmetic number, because the mean of its divisors is an integer number (4191059880).

Almost surely, 2^31621793279 is an apocalyptic number.

31621793279 is a deficient number, since it is larger than the sum of its proper divisors (1906685761).

31621793279 is a wasteful number, since it uses less digits than its factorization.

31621793279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587809.

The product of its digits is 857304, while the sum is 50.

The spelling of 31621793279 in words is "thirty-one billion, six hundred twenty-one million, seven hundred ninety-three thousand, two hundred seventy-nine".