21376601275605 has 32 divisors (see below), whose sum is σ = 34426744934400. Its totient is φ = 11326249004352.

The previous prime is 21376601275583. The next prime is 21376601275619. The reversal of 21376601275605 is 50657210667312.

It is a de Polignac number, because none of the positive numbers 2^k-21376601275605 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041609 + ... + 6621038.

It is an arithmetic number, because the mean of its divisors is an integer number (1075835779200).

Almost surely, 2^{21376601275605} is an apocalyptic number.

It is an amenable number.

21376601275605 is a deficient number, since it is larger than the sum of its proper divisors (13050143658795).

21376601275605 is a wasteful number, since it uses less digits than its factorization.

21376601275605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7663873.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 21376601275605 in words is "twenty-one trillion, three hundred seventy-six billion, six hundred one million, two hundred seventy-five thousand, six hundred five".