31607388649 has 8 divisors (see below), whose sum is σ = 33273808640. Its totient is φ = 29941256016.

The previous prime is 31607388587. The next prime is 31607388667. The reversal of 31607388649 is 94688370613.

It is a happy number.

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 31607388649 - 2¹⁹ = 31606864361 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 31607388649.

It is not an unprimeable number, because it can be changed into a prime (31607388749) 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, 175879 + ... + 306835.

It is an arithmetic number, because the mean of its divisors is an integer number (4159226080).

Almost surely, 2^31607388649 is an apocalyptic number.

It is an amenable number.

31607388649 is a deficient number, since it is larger than the sum of its proper divisors (1666419991).

31607388649 is a wasteful number, since it uses less digits than its factorization.

31607388649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143679.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 31607388649 in words is "thirty-one billion, six hundred seven million, three hundred eighty-eight thousand, six hundred forty-nine".