31738881005 has 16 divisors (see below), whose sum is σ = 41047560624. Its totient is φ = 23420136960.

The previous prime is 31738880977. The next prime is 31738881043. The reversal of 31738881005 is 50018883713.

It can be written as a sum of positive squares in 8 ways, for example, as 2780031076 + 28958849929 = 52726^2 + 170173^2 .

It is not a de Polignac number, because 31738881005 - 2⁸ = 31738880749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 98954 + ... + 270683.

It is an arithmetic number, because the mean of its divisors is an integer number (2565472539).

Almost surely, 2^31738881005 is an apocalyptic number.

It is an amenable number.

31738881005 is a deficient number, since it is larger than the sum of its proper divisors (9308679619).

31738881005 is a wasteful number, since it uses less digits than its factorization.

31738881005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370976.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 31738881005 in words is "thirty-one billion, seven hundred thirty-eight million, eight hundred eighty-one thousand, five".