26289481556 has 96 divisors (see below), whose sum is σ = 53547795840. Its totient is φ = 11189477376.

The previous prime is 26289481469. The next prime is 26289481567. The reversal of 26289481556 is 65518498262.

It is a happy number.

It is a super-2 number, since 2×26289481556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14995976 + ... + 14997728.

It is an arithmetic number, because the mean of its divisors is an integer number (557789540).

Almost surely, 2^26289481556 is an apocalyptic number.

26289481556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

26289481556 is an abundant number, since it is smaller than the sum of its proper divisors (27258314284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26289481556 is a wasteful number, since it uses less digits than its factorization.

26289481556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185 (or 2183 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 56.

The spelling of 26289481556 in words is "twenty-six billion, two hundred eighty-nine million, four hundred eighty-one thousand, five hundred fifty-six".