21160661366316 has 48 divisors (see below), whose sum is σ = 49696822085120. Its totient is φ = 7007575049280.

The previous prime is 21160661366269. The next prime is 21160661366333. The reversal of 21160661366316 is 61366316606112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11766525 + ... + 13445163.

Almost surely, 2^{21160661366316} is an apocalyptic number.

It is an amenable number.

21160661366316 is an abundant number, since it is smaller than the sum of its proper divisors (28536160718804).

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

21160661366316 is a wasteful number, since it uses less digits than its factorization.

21160661366316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685494 (or 1685492 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 21160661366316 in words is "twenty-one trillion, one hundred sixty billion, six hundred sixty-one million, three hundred sixty-six thousand, three hundred sixteen".