31440856153 has 32 divisors (see below), whose sum is σ = 38238117120. Its totient is φ = 25289521920.

The previous prime is 31440856099. The next prime is 31440856163. The reversal of 31440856153 is 35165804413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31440856153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31440856163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 790483 + ... + 829303.

It is an arithmetic number, because the mean of its divisors is an integer number (1194941160).

Almost surely, 2^31440856153 is an apocalyptic number.

It is an amenable number.

31440856153 is a deficient number, since it is larger than the sum of its proper divisors (6797260967).

31440856153 is a wasteful number, since it uses less digits than its factorization.

31440856153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38977.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 31440856153 in words is "thirty-one billion, four hundred forty million, eight hundred fifty-six thousand, one hundred fifty-three".