21626214411551 has 8 divisors (see below), whose sum is σ = 23212020626784. Its totient is φ = 20075261080320.

The previous prime is 21626214411533. The next prime is 21626214411583. The reversal of 21626214411551 is 15511441262612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21626214411551 - 2¹⁴ = 21626214395167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21626214411499 and 21626214411508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21626214411511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8713219715 + ... + 8713222196.

It is an arithmetic number, because the mean of its divisors is an integer number (2901502578348).

Almost surely, 2^{21626214411551} is an apocalyptic number.

21626214411551 is a deficient number, since it is larger than the sum of its proper divisors (1585806215233).

21626214411551 is a wasteful number, since it uses less digits than its factorization.

21626214411551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17426442001.

The product of its digits is 115200, while the sum is 41.

The spelling of 21626214411551 in words is "twenty-one trillion, six hundred twenty-six billion, two hundred fourteen million, four hundred eleven thousand, five hundred fifty-one".