5561615100 has 72 divisors (see below), whose sum is σ = 16194237808. Its totient is φ = 1473638400.

The previous prime is 5561615083. The next prime is 5561615173. The reversal of 5561615100 is 15161655.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11941 + ... + 106140.

Almost surely, 2^5561615100 is an apocalyptic number.

5561615100 is a gapful number since it is divisible by the number (50) 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 5561615100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8097118904).

5561615100 is an abundant number, since it is smaller than the sum of its proper divisors (10632622708).

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

5561615100 is a wasteful number, since it uses less digits than its factorization.

5561615100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118255 (or 118248 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 5561615100 is about 74576.2368318488. The cubic root of 5561615100 is about 1771.7413040163.

Adding to 5561615100 its reverse (15161655), we get a palindrome (5576776755).

The spelling of 5561615100 in words is "five billion, five hundred sixty-one million, six hundred fifteen thousand, one hundred".