18561016562 has 16 divisors (see below), whose sum is σ = 31018799232. Its totient is φ = 8257318320.

The previous prime is 18561016543. The next prime is 18561016577. The reversal of 18561016562 is 26561016581.

It is a super-2 number, since 2×18561016562² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8974313 + ... + 8976380.

It is an arithmetic number, because the mean of its divisors is an integer number (1938674952).

Almost surely, 2^18561016562 is an apocalyptic number.

18561016562 is a deficient number, since it is larger than the sum of its proper divisors (12457782670).

18561016562 is a wasteful number, since it uses less digits than its factorization.

18561016562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17950753.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 18561016562 in words is "eighteen billion, five hundred sixty-one million, sixteen thousand, five hundred sixty-two".