26623660551 has 8 divisors (see below), whose sum is σ = 35499665664. Its totient is φ = 17748381240.

The previous prime is 26623660549. The next prime is 26623660573. The reversal of 26623660551 is 15506632662.

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

It is not a de Polignac number, because 26623660551 - 2¹ = 26623660549 is a prime.

It is a super-2 number, since 2×26623660551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26623660351) 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, 89151 + ... + 247376.

It is an arithmetic number, because the mean of its divisors is an integer number (4437458208).

Almost surely, 2^26623660551 is an apocalyptic number.

26623660551 is a deficient number, since it is larger than the sum of its proper divisors (8876005113).

26623660551 is a wasteful number, since it uses less digits than its factorization.

26623660551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362901.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 26623660551 in words is "twenty-six billion, six hundred twenty-three million, six hundred sixty thousand, five hundred fifty-one".