1636664354560 has 72 divisors (see below), whose sum is σ = 3994291103040. Its totient is φ = 642313531392.

The previous prime is 1636664354557. The next prime is 1636664354561. The reversal of 1636664354560 is 654534666361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636664354561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11994840 + ... + 12130519.

It is an arithmetic number, because the mean of its divisors is an integer number (55476265320).

Almost surely, 2^{1636664354560} is an apocalyptic number.

1636664354560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1636664354560 is an abundant number, since it is smaller than the sum of its proper divisors (2357626748480).

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

1636664354560 is an equidigital number, since it uses as much as digits as its factorization.

1636664354560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24125433 (or 24125419 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 55.

The spelling of 1636664354560 in words is "one trillion, six hundred thirty-six billion, six hundred sixty-four million, three hundred fifty-four thousand, five hundred sixty".