31161940894081 has 8 divisors (see below), whose sum is σ = 31860840280320. Its totient is φ = 30464536481568.

The previous prime is 31161940894069. The next prime is 31161940894093. The reversal of 31161940894081 is 18049804916113.

It is an interprime number because it is at equal distance from previous prime (31161940894069) and next prime (31161940894093).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31161940894081 - 2⁷ = 31161940893953 is a prime.

It is a super-2 number, since 2×31161940894081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31161940804081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373701276 + ... + 373784653.

It is an arithmetic number, because the mean of its divisors is an integer number (3982605035040).

Almost surely, 2^{31161940894081} is an apocalyptic number.

It is an amenable number.

31161940894081 is a deficient number, since it is larger than the sum of its proper divisors (698899386239).

31161940894081 is an equidigital number, since it uses as much as digits as its factorization.

31161940894081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747486863.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 31161940894081 in words is "thirty-one trillion, one hundred sixty-one billion, nine hundred forty million, eight hundred ninety-four thousand, eighty-one".