31440545540 has 24 divisors (see below), whose sum is σ = 66044668032. Its totient is φ = 12572499680.

The previous prime is 31440545471. The next prime is 31440545561. The reversal of 31440545540 is 4554504413.

It is a self number, because there is not a number n which added to its sum of digits gives 31440545540.

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, 162566 + ... + 298845.

It is an arithmetic number, because the mean of its divisors is an integer number (2751861168).

Almost surely, 2^31440545540 is an apocalyptic number.

It is an amenable number.

31440545540 is an abundant number, since it is smaller than the sum of its proper divisors (34604122492).

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

31440545540 is a wasteful number, since it uses less digits than its factorization.

31440545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464827 (or 464825 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 31440545540 in words is "thirty-one billion, four hundred forty million, five hundred forty-five thousand, five hundred forty".