163841991076 has 9 divisors (see below), whose sum is σ = 286724901099. Its totient is φ = 81920590764.

The previous prime is 163841991059. The next prime is 163841991107. The reversal of 163841991076 is 670199148361.

The square root of 163841991076 is 404774.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 708355 + ... + 910741.

Almost surely, 2^163841991076 is an apocalyptic number.

163841991076 is the 404774-th square number.

It is an amenable number.

163841991076 is a deficient number, since it is larger than the sum of its proper divisors (122882910023).

163841991076 is an frugal number, since it uses more digits than its factorization.

163841991076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404778 (or 202389 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 163841991076 in words is "one hundred sixty-three billion, eight hundred forty-one million, nine hundred ninety-one thousand, seventy-six".