5161661100 has 54 divisors (see below), whose sum is σ = 16178942780. Its totient is φ = 1376442720.

The previous prime is 5161661059. The next prime is 5161661111. The reversal of 5161661100 is 11661615.

It is a super-2 number, since 2×5161661100² = 53285490622506420000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2866690 + ... + 2868489.

Almost surely, 2^5161661100 is an apocalyptic number.

5161661100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5161661100 is an abundant number, since it is smaller than the sum of its proper divisors (11017281680).

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

5161661100 is a wasteful number, since it uses less digits than its factorization.

5161661100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735199 (or 5735189 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 5161661100 is about 71844.7012659946. The cubic root of 5161661100 is about 1728.2099273957.

The spelling of 5161661100 in words is "five billion, one hundred sixty-one million, six hundred sixty-one thousand, one hundred".