31449377172 has 48 divisors (see below), whose sum is σ = 74158987392. Its totient is φ = 10372252800.

The previous prime is 31449377143. The next prime is 31449377189. The reversal of 31449377172 is 27177394413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1946913 + ... + 1962999.

It is an arithmetic number, because the mean of its divisors is an integer number (1544978904).

Almost surely, 2^31449377172 is an apocalyptic number.

It is an amenable number.

31449377172 is an abundant number, since it is smaller than the sum of its proper divisors (42709610220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31449377172 is a wasteful number, since it uses less digits than its factorization.

31449377172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17808 (or 17806 counting only the distinct ones).

The product of its digits is 889056, while the sum is 48.

The spelling of 31449377172 in words is "thirty-one billion, four hundred forty-nine million, three hundred seventy-seven thousand, one hundred seventy-two".