165561151101612 has 48 divisors (see below), whose sum is σ = 449826523759872. Its totient is φ = 46410673083840.

The previous prime is 165561151101589. The next prime is 165561151101659. The reversal of 165561151101612 is 216101151165561.

It is a super-2 number, since 2×165561151101612² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18594015214 + ... + 18594024117.

It is an arithmetic number, because the mean of its divisors is an integer number (9371385911664).

Almost surely, 2^{165561151101612} is an apocalyptic number.

165561151101612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165561151101612 is an abundant number, since it is smaller than the sum of its proper divisors (284265372658260).

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

165561151101612 is a wasteful number, since it uses less digits than its factorization.

165561151101612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37188039398 (or 37188039396 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 42.

The spelling of 165561151101612 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, one hundred one thousand, six hundred twelve".