18079561650 has 24 divisors (see below), whose sum is σ = 44837313264. Its totient is φ = 4821216400.

The previous prime is 18079561649. The next prime is 18079561699. The reversal of 18079561650 is 5616597081.

It is a self number, because there is not a number n which added to its sum of digits gives 18079561650.

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, 60265056 + ... + 60265355.

It is an arithmetic number, because the mean of its divisors is an integer number (1868221386).

Almost surely, 2^18079561650 is an apocalyptic number.

18079561650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18079561650 is an abundant number, since it is smaller than the sum of its proper divisors (26757751614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18079561650 is a wasteful number, since it uses less digits than its factorization.

18079561650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120530426 (or 120530421 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 18079561650 in words is "eighteen billion, seventy-nine million, five hundred sixty-one thousand, six hundred fifty".