166436555531232 has 192 divisors, whose sum is σ = 506952143437824. Its totient is φ = 46825979143680.

The previous prime is 166436555531203. The next prime is 166436555531269. The reversal of 166436555531232 is 232135555634661.

It is a super-2 number, since 2×166436555531232² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119567113 + ... + 120951095.

It is an arithmetic number, because the mean of its divisors is an integer number (2640375747072).

Almost surely, 2^{166436555531232} is an apocalyptic number.

166436555531232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166436555531232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253476071718912).

166436555531232 is an abundant number, since it is smaller than the sum of its proper divisors (340515587906592).

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

166436555531232 is a wasteful number, since it uses less digits than its factorization.

166436555531232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386741 (or 1386733 counting only the distinct ones).

The product of its digits is 58320000, while the sum is 57.

The spelling of 166436555531232 in words is "one hundred sixty-six trillion, four hundred thirty-six billion, five hundred fifty-five million, five hundred thirty-one thousand, two hundred thirty-two".