31707745305 has 16 divisors (see below), whose sum is σ = 50882941824. Its totient is φ = 16860614400.

The previous prime is 31707745291. The next prime is 31707745309. The reversal of 31707745305 is 50354770713.

It is not a de Polignac number, because 31707745305 - 2⁹ = 31707744793 is a prime.

It is a super-2 number, since 2×31707745305² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31707745309) 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 15 ways as a sum of consecutive naturals, for example, 3131221 + ... + 3141330.

It is an arithmetic number, because the mean of its divisors is an integer number (3180183864).

Almost surely, 2^31707745305 is an apocalyptic number.

It is an amenable number.

31707745305 is a deficient number, since it is larger than the sum of its proper divisors (19175196519).

31707745305 is a wasteful number, since it uses less digits than its factorization.

31707745305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272896.

The product of its (nonzero) digits is 308700, while the sum is 42.

The spelling of 31707745305 in words is "thirty-one billion, seven hundred seven million, seven hundred forty-five thousand, three hundred five".