31440545539 has 6 divisors (see below), whose sum is σ = 34045087956. Its totient is φ = 29022041880.

The previous prime is 31440545471. The next prime is 31440545561. The reversal of 31440545539 is 93554504413.

It is not a de Polignac number, because 31440545539 - 2¹⁹ = 31440021251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31440545495 and 31440545504.

It is not an unprimeable number, because it can be changed into a prime (31440545579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93019197 + ... + 93019534.

It is an arithmetic number, because the mean of its divisors is an integer number (5674181326).

Almost surely, 2^31440545539 is an apocalyptic number.

31440545539 is a deficient number, since it is larger than the sum of its proper divisors (2604542417).

31440545539 is a wasteful number, since it uses less digits than its factorization.

31440545539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186038757 (or 186038744 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 31440545539 in words is "thirty-one billion, four hundred forty million, five hundred forty-five thousand, five hundred thirty-nine".