31800166533036 has 72 divisors (see below), whose sum is σ = 90939196805184. Its totient is φ = 9636414097680.

The previous prime is 31800166533029. The next prime is 31800166533073. The reversal of 31800166533036 is 63033566100813.

31800166533036 is a `hidden beast` number, since 3 + 1 + 80 + 0 + 1 + 6 + 6 + 533 + 0 + 36 = 666.

It is a super-2 number, since 2×31800166533036² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31800166532982 and 31800166533000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1487090250 + ... + 1487111633.

It is an arithmetic number, because the mean of its divisors is an integer number (1263044400072).

Almost surely, 2^{31800166533036} is an apocalyptic number.

31800166533036 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

31800166533036 is an abundant number, since it is smaller than the sum of its proper divisors (59139030272148).

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

31800166533036 is a wasteful number, since it uses less digits than its factorization.

31800166533036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974201913 (or 2974201899 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

It can be divided in two parts, 31800 and 166533036, that added together give a square (166564836 = 12906²).

The spelling of 31800166533036 in words is "thirty-one trillion, eight hundred billion, one hundred sixty-six million, five hundred thirty-three thousand, thirty-six".