31540044004 has 48 divisors (see below), whose sum is σ = 66417361920. Its totient is φ = 12802402080.

The previous prime is 31540043959. The next prime is 31540044017. The reversal of 31540044004 is 40044004513.

It is a self number, because there is not a number n which added to its sum of digits gives 31540044004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3896049 + ... + 3904135.

It is an arithmetic number, because the mean of its divisors is an integer number (1383695040).

Almost surely, 2^31540044004 is an apocalyptic number.

It is an amenable number.

31540044004 is an abundant number, since it is smaller than the sum of its proper divisors (34877317916).

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

31540044004 is a wasteful number, since it uses less digits than its factorization.

31540044004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15448 (or 15446 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 31540044004 its reverse (40044004513), we get a palindrome (71584048517).

The spelling of 31540044004 in words is "thirty-one billion, five hundred forty million, forty-four thousand, four".