31347761838 has 16 divisors (see below), whose sum is σ = 65995288320. Its totient is φ = 9899293176.

The previous prime is 31347761833. The next prime is 31347761867. The reversal of 31347761838 is 83816774313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31347761833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137490070 + ... + 137490297.

It is an arithmetic number, because the mean of its divisors is an integer number (4124705520).

Almost surely, 2^31347761838 is an apocalyptic number.

31347761838 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

31347761838 is an abundant number, since it is smaller than the sum of its proper divisors (34647526482).

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

31347761838 is a wasteful number, since it uses less digits than its factorization.

31347761838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274980391.

The product of its digits is 2032128, while the sum is 51.

The spelling of 31347761838 in words is "thirty-one billion, three hundred forty-seven million, seven hundred sixty-one thousand, eight hundred thirty-eight".