26371023561 has 6 divisors (see below), whose sum is σ = 38091478490. Its totient is φ = 17580682368.

The previous prime is 26371023517. The next prime is 26371023583. The reversal of 26371023561 is 16532017362.

26371023561 is a `hidden beast` number, since 2 + 6 + 3 + 71 + 0 + 23 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18835915536 + 7535108025 = 137244^2 + 86805^2 .

It is not a de Polignac number, because 26371023561 - 2¹¹ = 26371021513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26371023361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1465056856 + ... + 1465056873.

Almost surely, 2^26371023561 is an apocalyptic number.

It is an amenable number.

26371023561 is a deficient number, since it is larger than the sum of its proper divisors (11720454929).

26371023561 is a wasteful number, since it uses less digits than its factorization.

26371023561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930113735 (or 2930113732 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 26371023561 in words is "twenty-six billion, three hundred seventy-one million, twenty-three thousand, five hundred sixty-one".