31748611934861 has 16 divisors (see below), whose sum is σ = 35544129062400. Its totient is φ = 28181416485888.

The previous prime is 31748611934857. The next prime is 31748611934881. The reversal of 31748611934861 is 16843911684713.

It is a cyclic number.

It is not a de Polignac number, because 31748611934861 - 2² = 31748611934857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31748611934794 and 31748611934803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31748611934881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220315676 + ... + 220459733.

It is an arithmetic number, because the mean of its divisors is an integer number (2221508066400).

Almost surely, 2^{31748611934861} is an apocalyptic number.

It is an amenable number.

31748611934861 is a deficient number, since it is larger than the sum of its proper divisors (3795517127539).

31748611934861 is a wasteful number, since it uses less digits than its factorization.

31748611934861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440775668.

The product of its digits is 20901888, while the sum is 62.

The spelling of 31748611934861 in words is "thirty-one trillion, seven hundred forty-eight billion, six hundred eleven million, nine hundred thirty-four thousand, eight hundred sixty-one".