31540044006 has 64 divisors (see below), whose sum is σ = 71872819200. Its totient is φ = 10246305600.

The previous prime is 31540043959. The next prime is 31540044017. The reversal of 31540044006 is 60044004513.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2293491 + ... + 2307201.

It is an arithmetic number, because the mean of its divisors is an integer number (1123012800).

Almost surely, 2^31540044006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31540044006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35936409600).

31540044006 is an abundant number, since it is smaller than the sum of its proper divisors (40332775194).

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

31540044006 is a wasteful number, since it uses less digits than its factorization.

31540044006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14802 (or 14796 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 31540044006 its reverse (60044004513), we get a palindrome (91584048519).

The spelling of 31540044006 in words is "thirty-one billion, five hundred forty million, forty-four thousand, six".