161876640 has 96 divisors (see below), whose sum is σ = 512096256. Its totient is φ = 42982400.

The previous prime is 161876633. The next prime is 161876653. The reversal of 161876640 is 46678161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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, 140065 + ... + 141215.

It is an arithmetic number, because the mean of its divisors is an integer number (5334336).

Almost surely, 2^161876640 is an apocalyptic number.

161876640 is a gapful number since it is divisible by the number (10) 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 161876640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256048128).

161876640 is an abundant number, since it is smaller than the sum of its proper divisors (350219616).

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

161876640 is a wasteful number, since it uses less digits than its factorization.

161876640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 161876640 is about 12723.0750999906. The cubic root of 161876640 is about 544.9977723445.

The spelling of 161876640 in words is "one hundred sixty-one million, eight hundred seventy-six thousand, six hundred forty".