31405155044 has 6 divisors (see below), whose sum is σ = 54959021334. Its totient is φ = 15702577520.

The previous prime is 31405154971. The next prime is 31405155053. The reversal of 31405155044 is 44055150413.

It can be written as a sum of positive squares in only one way, i.e., 31375036900 + 30118144 = 177130^2 + 5488^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31405155044.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3925644377 + ... + 3925644384.

It is an arithmetic number, because the mean of its divisors is an integer number (9159836889).

Almost surely, 2^31405155044 is an apocalyptic number.

It is an amenable number.

31405155044 is a deficient number, since it is larger than the sum of its proper divisors (23553866290).

31405155044 is a wasteful number, since it uses less digits than its factorization.

31405155044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851288765 (or 7851288763 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 31405155044 in words is "thirty-one billion, four hundred five million, one hundred fifty-five thousand, forty-four".