31555711144 has 16 divisors (see below), whose sum is σ = 59172419700. Its totient is φ = 15776399232.

The previous prime is 31555711141. The next prime is 31555711163. The reversal of 31555711144 is 44111755513.

It can be written as a sum of positive squares in 2 ways, for example, as 31120488100 + 435223044 = 176410^2 + 20862^2 .

It is not an unprimeable number, because it can be changed into a prime (31555711141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87039 + ... + 265870.

Almost surely, 2^31555711144 is an apocalyptic number.

It is an amenable number.

31555711144 is a deficient number, since it is larger than the sum of its proper divisors (27616708556).

31555711144 is a wasteful number, since it uses less digits than its factorization.

31555711144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364092 (or 364088 counting only the distinct ones).

The product of its digits is 42000, while the sum is 37.

The spelling of 31555711144 in words is "thirty-one billion, five hundred fifty-five million, seven hundred eleven thousand, one hundred forty-four".