215661466211160 has 128 divisors (see below), whose sum is σ = 660922925690880. Its totient is φ = 56271384519168.

The previous prime is 215661466211131. The next prime is 215661466211179. The reversal of 215661466211160 is 61112664166512.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16560694 + ... + 26562746.

It is an arithmetic number, because the mean of its divisors is an integer number (5163460356960).

Almost surely, 2^{215661466211160} is an apocalyptic number.

215661466211160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215661466211160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330461462845440).

215661466211160 is an abundant number, since it is smaller than the sum of its proper divisors (445261459479720).

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

215661466211160 is a wasteful number, since it uses less digits than its factorization.

215661466211160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005937 (or 10005933 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 215661466211160 in words is "two hundred fifteen trillion, six hundred sixty-one billion, four hundred sixty-six million, two hundred eleven thousand, one hundred sixty".