5665561515 has 12 divisors (see below), whose sum is σ = 9820306704. Its totient is φ = 3021632784.

The previous prime is 5665561483. The next prime is 5665561543. The reversal of 5665561515 is 5151655665.

It is not a de Polignac number, because 5665561515 - 2⁵ = 5665561483 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 125901367 = 5665561515 / (5 + 6 + 6 + 5 + 5 + 6 + 1 + 5 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62950639 + ... + 62950728.

It is an arithmetic number, because the mean of its divisors is an integer number (818358892).

Almost surely, 2^5665561515 is an apocalyptic number.

5665561515 is a deficient number, since it is larger than the sum of its proper divisors (4154745189).

5665561515 is a wasteful number, since it uses less digits than its factorization.

5665561515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125901378 (or 125901375 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 5665561515 is about 75269.9243722219. The cubic root of 5665561515 is about 1782.7111732120.

The spelling of 5665561515 in words is "five billion, six hundred sixty-five million, five hundred sixty-one thousand, five hundred fifteen".