5661515550 has 96 divisors (see below), whose sum is σ = 14715986688. Its totient is φ = 1437694720.

The previous prime is 5661515533. The next prime is 5661515551. The reversal of 5661515550 is 555151665.

It is a junction number, because it is equal to n+sod(n) for n = 5661515499 and 5661515508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661515551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 800329 + ... + 807371.

It is an arithmetic number, because the mean of its divisors is an integer number (153291528).

Almost surely, 2^5661515550 is an apocalyptic number.

5661515550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661515550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7357993344).

5661515550 is an abundant number, since it is smaller than the sum of its proper divisors (9054471138).

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

5661515550 is a wasteful number, since it uses less digits than its factorization.

5661515550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314 (or 7309 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The square root of 5661515550 is about 75243.0432000195. The cubic root of 5661515550 is about 1782.2867078030.

The spelling of 5661515550 in words is "five billion, six hundred sixty-one million, five hundred fifteen thousand, five hundred fifty".