8015648199561 has 32 divisors (see below), whose sum is σ = 12072030839040. Its totient is φ = 5255817840000.

The previous prime is 8015648199521. The next prime is 8015648199583. The reversal of 8015648199561 is 1659918465108.

8015648199561 is a `hidden beast` number, since 8 + 0 + 1 + 5 + 6 + 481 + 9 + 95 + 61 = 666.

It is not a de Polignac number, because 8015648199561 - 2⁹ = 8015648199049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8015648199521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9321220 + ... + 10144773.

It is an arithmetic number, because the mean of its divisors is an integer number (377250963720).

Almost surely, 2^{8015648199561} is an apocalyptic number.

It is an amenable number.

8015648199561 is a deficient number, since it is larger than the sum of its proper divisors (4056382639479).

8015648199561 is a wasteful number, since it uses less digits than its factorization.

8015648199561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19466254 (or 19466248 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 63.

The spelling of 8015648199561 in words is "eight trillion, fifteen billion, six hundred forty-eight million, one hundred ninety-nine thousand, five hundred sixty-one".