31073532640 has 48 divisors (see below), whose sum is σ = 75201754320. Its totient is φ = 12126254080.

The previous prime is 31073532617. The next prime is 31073532641. The reversal of 31073532640 is 4623537013.

It is a junction number, because it is equal to n+sod(n) for n = 31073532596 and 31073532605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31073532641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2361850 + ... + 2374969.

It is an arithmetic number, because the mean of its divisors is an integer number (1566703215).

Almost surely, 2^31073532640 is an apocalyptic number.

It is an amenable number.

31073532640 is an abundant number, since it is smaller than the sum of its proper divisors (44128221680).

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

31073532640 is a wasteful number, since it uses less digits than its factorization.

31073532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736875 (or 4736867 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 31073532640 in words is "thirty-one billion, seventy-three million, five hundred thirty-two thousand, six hundred forty".