5661515553 has 8 divisors (see below), whose sum is σ = 7553474400. Its totient is φ = 3771950208.

The previous prime is 5661515551. The next prime is 5661515567. The reversal of 5661515553 is 3555151665.

It is a happy number.

5661515553 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5661515553 - 2¹ = 5661515551 is a prime.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 592848 + ... + 602321.

It is an arithmetic number, because the mean of its divisors is an integer number (944184300).

Almost surely, 2^5661515553 is an apocalyptic number.

It is an amenable number.

5661515553 is a deficient number, since it is larger than the sum of its proper divisors (1891958847).

5661515553 is a wasteful number, since it uses less digits than its factorization.

5661515553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196751.

The product of its digits is 337500, while the sum is 42.

The square root of 5661515553 is about 75243.0432199549. The cubic root of 5661515553 is about 1782.2867081178.

The spelling of 5661515553 in words is "five billion, six hundred sixty-one million, five hundred fifteen thousand, five hundred fifty-three".