161774976 has 64 divisors (see below), whose sum is σ = 468792000. Its totient is φ = 49021440.

The previous prime is 161774959. The next prime is 161774983. The reversal of 161774976 is 679477161.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×161774976² = 52342285719601152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14926 + ... + 23373.

It is an arithmetic number, because the mean of its divisors is an integer number (7324875).

Almost surely, 2^161774976 is an apocalyptic number.

161774976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161774976 is an abundant number, since it is smaller than the sum of its proper divisors (307017024).

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

161774976 is a wasteful number, since it uses less digits than its factorization.

161774976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38327 (or 38315 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 161774976 is about 12719.0792119556. The cubic root of 161774976 is about 544.8836561124.

The spelling of 161774976 in words is "one hundred sixty-one million, seven hundred seventy-four thousand, nine hundred seventy-six".