31149426788 has 12 divisors (see below), whose sum is σ = 54528401340. Its totient is φ = 15569883552.

The previous prime is 31149426743. The next prime is 31149426793. The reversal of 31149426788 is 88762494113.

It can be written as a sum of positive squares in 2 ways, for example, as 6116491264 + 25032935524 = 78208^2 + 158218^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1192931 + ... + 1218762.

It is an arithmetic number, because the mean of its divisors is an integer number (4544033445).

Almost surely, 2^31149426788 is an apocalyptic number.

It is an amenable number.

31149426788 is a deficient number, since it is larger than the sum of its proper divisors (23378974552).

31149426788 is a wasteful number, since it uses less digits than its factorization.

31149426788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414926 (or 2414924 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The spelling of 31149426788 in words is "thirty-one billion, one hundred forty-nine million, four hundred twenty-six thousand, seven hundred eighty-eight".