26455720477 has 4 divisors (see below), whose sum is σ = 26477749756. Its totient is φ = 26433691200.

The previous prime is 26455720469. The next prime is 26455720483. The reversal of 26455720477 is 77402755462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2365265956 + 24090454521 = 48634^2 + 155211^2 .

It is a cyclic number.

It is not a de Polignac number, because 26455720477 - 2³ = 26455720469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26455720477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26455720457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11012838 + ... + 11015239.

It is an arithmetic number, because the mean of its divisors is an integer number (6619437439).

Almost surely, 2^26455720477 is an apocalyptic number.

It is an amenable number.

26455720477 is a deficient number, since it is larger than the sum of its proper divisors (22029279).

26455720477 is a wasteful number, since it uses less digits than its factorization.

26455720477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22029278.

The product of its (nonzero) digits is 3292800, while the sum is 49.

The spelling of 26455720477 in words is "twenty-six billion, four hundred fifty-five million, seven hundred twenty thousand, four hundred seventy-seven".