21641712762153 has 16 divisors (see below), whose sum is σ = 31479049728000. Its totient is φ = 13116108385680.

The previous prime is 21641712762101. The next prime is 21641712762157. The reversal of 21641712762153 is 35126721714612.

It is a happy number.

It is not a de Polignac number, because 21641712762153 - 2²⁰ = 21641711713577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21641712762157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3618888 + ... + 7508646.

It is an arithmetic number, because the mean of its divisors is an integer number (1967440608000).

Almost surely, 2^{21641712762153} is an apocalyptic number.

It is an amenable number.

21641712762153 is a deficient number, since it is larger than the sum of its proper divisors (9837336965847).

21641712762153 is a wasteful number, since it uses less digits than its factorization.

21641712762153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058372.

The product of its digits is 846720, while the sum is 48.

The spelling of 21641712762153 in words is "twenty-one trillion, six hundred forty-one billion, seven hundred twelve million, seven hundred sixty-two thousand, one hundred fifty-three".