8615331561 has 8 divisors (see below), whose sum is σ = 11500578880. Its totient is φ = 5736819312.

The previous prime is 8615331541. The next prime is 8615331601. The reversal of 8615331561 is 1651335168.

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

It is not a de Polignac number, because 8615331561 - 2⁷ = 8615331433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8615331541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680781 + ... + 1685898.

It is an arithmetic number, because the mean of its divisors is an integer number (1437572360).

Almost surely, 2^8615331561 is an apocalyptic number.

It is an amenable number.

8615331561 is a deficient number, since it is larger than the sum of its proper divisors (2885247319).

8615331561 is a wasteful number, since it uses less digits than its factorization.

8615331561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367535.

The product of its digits is 64800, while the sum is 39.

The square root of 8615331561 is about 92818.8103834562. The cubic root of 8615331561 is about 2050.0163838468.

The spelling of 8615331561 in words is "eight billion, six hundred fifteen million, three hundred thirty-one thousand, five hundred sixty-one".