5661037400 has 96 divisors (see below), whose sum is σ = 14009973840. Its totient is φ = 2119925760.

The previous prime is 5661037387. The next prime is 5661037409. The reversal of 5661037400 is 47301665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661037409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 651887 + ... + 660513.

Almost surely, 2^5661037400 is an apocalyptic number.

5661037400 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 5661037400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7004986920).

5661037400 is an abundant number, since it is smaller than the sum of its proper divisors (8348936440).

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

5661037400 is a wasteful number, since it uses less digits than its factorization.

5661037400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8853 (or 8844 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 5661037400 is about 75239.8657627723. The cubic root of 5661037400 is about 1782.2365313456.

The spelling of 5661037400 in words is "five billion, six hundred sixty-one million, thirty-seven thousand, four hundred".