5161561100 has 36 divisors (see below), whose sum is σ = 11687574864. Its totient is φ = 1974857280.

The previous prime is 5161561099. The next prime is 5161561151. The reversal of 5161561100 is 11651615.

It is a self number, because there is not a number n which added to its sum of digits gives 5161561100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1119779 + ... + 1124378.

Almost surely, 2^5161561100 is an apocalyptic number.

5161561100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5161561100 is an abundant number, since it is smaller than the sum of its proper divisors (6526013764).

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

5161561100 is a wasteful number, since it uses less digits than its factorization.

5161561100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244194 (or 2244187 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 5161561100 is about 71844.0053170757. The cubic root of 5161561100 is about 1728.1987667696.

The spelling of 5161561100 in words is "five billion, one hundred sixty-one million, five hundred sixty-one thousand, one hundred".