31664636143 has 8 divisors (see below), whose sum is σ = 38092795520. Its totient is φ = 25712636760.

The previous prime is 31664636123. The next prime is 31664636173. The reversal of 31664636143 is 34163646613.

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 31664636143 - 2²¹ = 31662538991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31664636143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31664636123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119039853 + ... + 119040118.

It is an arithmetic number, because the mean of its divisors is an integer number (4761599440).

Almost surely, 2^31664636143 is an apocalyptic number.

31664636143 is a deficient number, since it is larger than the sum of its proper divisors (6428159377).

31664636143 is a wasteful number, since it uses less digits than its factorization.

31664636143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238079997.

The product of its digits is 559872, while the sum is 43.

The spelling of 31664636143 in words is "thirty-one billion, six hundred sixty-four million, six hundred thirty-six thousand, one hundred forty-three".