21164270606880 has 192 divisors, whose sum is σ = 71964867260160. Its totient is φ = 5212270063616.

The previous prime is 21164270606839. The next prime is 21164270606929. The reversal of 21164270606880 is 8860607246112.

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, 32732487 + ... + 33372806.

It is an arithmetic number, because the mean of its divisors is an integer number (374817016980).

Almost surely, 2^{21164270606880} is an apocalyptic number.

21164270606880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21164270606880 is an abundant number, since it is smaller than the sum of its proper divisors (50800596653280).

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

21164270606880 is a wasteful number, since it uses less digits than its factorization.

21164270606880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66105363 (or 66105355 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 21164270606880 in words is "twenty-one trillion, one hundred sixty-four billion, two hundred seventy million, six hundred six thousand, eight hundred eighty".