5661220515 has 16 divisors (see below), whose sum is σ = 9060359328. Its totient is φ = 3018515456.

The previous prime is 5661220511. The next prime is 5661220531. The reversal of 5661220515 is 5150221665.

It is a cyclic number.

It is not a de Polignac number, because 5661220515 - 2² = 5661220511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661220511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10579 + ... + 106931.

It is an arithmetic number, because the mean of its divisors is an integer number (566272458).

Almost surely, 2^5661220515 is an apocalyptic number.

5661220515 is a deficient number, since it is larger than the sum of its proper divisors (3399138813).

5661220515 is a wasteful number, since it uses less digits than its factorization.

5661220515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100278.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 5661220515 is about 75241.0826277772. The cubic root of 5661220515 is about 1782.2557475363.

The spelling of 5661220515 in words is "five billion, six hundred sixty-one million, two hundred twenty thousand, five hundred fifteen".