31361566142440 has 32 divisors (see below), whose sum is σ = 70677519876000. Its totient is φ = 12524360491584.

The previous prime is 31361566142383. The next prime is 31361566142471. The reversal of 31361566142440 is 4424166516313.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633286350 + ... + 633335869.

It is an arithmetic number, because the mean of its divisors is an integer number (2208672496125).

Almost surely, 2^{31361566142440} is an apocalyptic number.

It is an amenable number.

31361566142440 is an abundant number, since it is smaller than the sum of its proper divisors (39315953733560).

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

31361566142440 is a wasteful number, since it uses less digits than its factorization.

31361566142440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266622849 (or 1266622845 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 31361566142440 in words is "thirty-one trillion, three hundred sixty-one billion, five hundred sixty-six million, one hundred forty-two thousand, four hundred forty".