31166317772061 has 8 divisors (see below), whose sum is σ = 43742200381920. Its totient is φ = 19683990171792.

The previous prime is 31166317772047. The next prime is 31166317772069. The reversal of 31166317772061 is 16027771366113.

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

It is not a de Polignac number, because 31166317772061 - 2¹⁹ = 31166317247773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31166317771995 and 31166317772013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31166317772069) 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, 273388752330 + ... + 273388752443.

It is an arithmetic number, because the mean of its divisors is an integer number (5467775047740).

Almost surely, 2^{31166317772061} is an apocalyptic number.

It is an amenable number.

31166317772061 is a deficient number, since it is larger than the sum of its proper divisors (12575882609859).

31166317772061 is a wasteful number, since it uses less digits than its factorization.

31166317772061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546777504795.

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 31166317772061 in words is "thirty-one trillion, one hundred sixty-six billion, three hundred seventeen million, seven hundred seventy-two thousand, sixty-one".