161022657950 has 48 divisors (see below), whose sum is σ = 373405279104. Its totient is φ = 50188879200.

The previous prime is 161022657923. The next prime is 161022657989. The reversal of 161022657950 is 59756220161.

It is a happy number.

It is a congruent number.

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, 20908184 + ... + 20915883.

It is an arithmetic number, because the mean of its divisors is an integer number (7779276648).

Almost surely, 2^161022657950 is an apocalyptic number.

161022657950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161022657950 is an abundant number, since it is smaller than the sum of its proper divisors (212382621154).

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

161022657950 is a wasteful number, since it uses less digits than its factorization.

161022657950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41824097 (or 41824092 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 161022657950 in words is "one hundred sixty-one billion, twenty-two million, six hundred fifty-seven thousand, nine hundred fifty".