31166211672 has 32 divisors (see below), whose sum is σ = 86572810800. Its totient is φ = 10388737152.

The previous prime is 31166211619. The next prime is 31166211733. The reversal of 31166211672 is 27611266113.

31166211672 is a `hidden beast` number, since 3 + 1 + 16 + 621 + 16 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72143793 + ... + 72144224.

Almost surely, 2^31166211672 is an apocalyptic number.

It is an amenable number.

31166211672 is an abundant number, since it is smaller than the sum of its proper divisors (55406599128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31166211672 is a wasteful number, since it uses less digits than its factorization.

31166211672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144288032 (or 144288022 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

Adding to 31166211672 its reverse (27611266113), we get a palindrome (58777477785).

The spelling of 31166211672 in words is "thirty-one billion, one hundred sixty-six million, two hundred eleven thousand, six hundred seventy-two".