26424621656621 has 32 divisors (see below), whose sum is σ = 28712054810880. Its totient is φ = 24226642252800.

The previous prime is 26424621656569. The next prime is 26424621656633. The reversal of 26424621656621 is 12665612642462.

It is a cyclic number.

It is not a de Polignac number, because 26424621656621 - 2¹⁸ = 26424621394477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26424621656821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389543135 + ... + 389610963.

It is an arithmetic number, because the mean of its divisors is an integer number (897251712840).

Almost surely, 2^{26424621656621} is an apocalyptic number.

It is an amenable number.

26424621656621 is a deficient number, since it is larger than the sum of its proper divisors (2287433154259).

26424621656621 is a wasteful number, since it uses less digits than its factorization.

26424621656621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71525.

The product of its digits is 9953280, while the sum is 53.

The spelling of 26424621656621 in words is "twenty-six trillion, four hundred twenty-four billion, six hundred twenty-one million, six hundred fifty-six thousand, six hundred twenty-one".