5661562500 has 384 divisors, whose sum is σ = 20343697920. Its totient is φ = 1350000000.

The previous prime is 5661562483. The next prime is 5661562573. The reversal of 5661562500 is 52651665.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 92812470 + ... + 92812530.

It is an arithmetic number, because the mean of its divisors is an integer number (52978380).

Almost surely, 2^5661562500 is an apocalyptic number.

5661562500 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 5661562500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10171848960).

5661562500 is an abundant number, since it is smaller than the sum of its proper divisors (14682135420).

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

5661562500 is an equidigital number, since it uses as much as digits as its factorization.

5661562500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 5661562500 is about 75243.3551883487. The cubic root of 5661562500 is about 1782.2916345244.

The spelling of 5661562500 in words is "five billion, six hundred sixty-one million, five hundred sixty-two thousand, five hundred".