161777565150 has 48 divisors (see below), whose sum is σ = 405344566704. Its totient is φ = 42695930880.

The previous prime is 161777565143. The next prime is 161777565181. The reversal of 161777565150 is 51565777161.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 161777565093 and 161777565102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5544817 + ... + 5573916.

It is an arithmetic number, because the mean of its divisors is an integer number (8444678473).

Almost surely, 2^161777565150 is an apocalyptic number.

161777565150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161777565150 is an abundant number, since it is smaller than the sum of its proper divisors (243567001554).

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

161777565150 is a wasteful number, since it uses less digits than its factorization.

161777565150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11118845 (or 11118840 counting only the distinct ones).

The product of its (nonzero) digits is 1543500, while the sum is 51.

The spelling of 161777565150 in words is "one hundred sixty-one billion, seven hundred seventy-seven million, five hundred sixty-five thousand, one hundred fifty".