31137640206 has 16 divisors (see below), whose sum is σ = 62333988048. Its totient is φ = 10369428800.

The previous prime is 31137640187. The next prime is 31137640207. The reversal of 31137640206 is 60204673113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31137640207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439255 + ... + 2451986.

It is an arithmetic number, because the mean of its divisors is an integer number (3895874253).

Almost surely, 2^31137640206 is an apocalyptic number.

31137640206 is an abundant number, since it is smaller than the sum of its proper divisors (31196347842).

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

31137640206 is a wasteful number, since it uses less digits than its factorization.

31137640206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892307.

The product of its (nonzero) digits is 18144, while the sum is 33.

The spelling of 31137640206 in words is "thirty-one billion, one hundred thirty-seven million, six hundred forty thousand, two hundred six".