26894061557 has 32 divisors (see below), whose sum is σ = 32194039680. Its totient is φ = 22177361920.

The previous prime is 26894061553. The next prime is 26894061583. The reversal of 26894061557 is 75516049862.

It is a cyclic number.

It is not a de Polignac number, because 26894061557 - 2² = 26894061553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26894061499 and 26894061508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26894061553) 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, 3211658 + ... + 3220020.

It is an arithmetic number, because the mean of its divisors is an integer number (1006063740).

Almost surely, 2^26894061557 is an apocalyptic number.

It is an amenable number.

26894061557 is a deficient number, since it is larger than the sum of its proper divisors (5299978123).

26894061557 is a wasteful number, since it uses less digits than its factorization.

26894061557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9013.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 26894061557 in words is "twenty-six billion, eight hundred ninety-four million, sixty-one thousand, five hundred fifty-seven".