26555572281 has 32 divisors (see below), whose sum is σ = 44064230400. Its totient is φ = 13880220480.

The previous prime is 26555572217. The next prime is 26555572291. The reversal of 26555572281 is 18227555562.

It is a happy number.

It is not a de Polignac number, because 26555572281 - 2⁶ = 26555572217 is a prime.

It is a super-2 number, since 2×26555572281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26555572281.

It is not an unprimeable number, because it can be changed into a prime (26555572291) 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, 1135935 + ... + 1159076.

It is an arithmetic number, because the mean of its divisors is an integer number (1377007200).

Almost surely, 2^26555572281 is an apocalyptic number.

26555572281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26555572281 is a deficient number, since it is larger than the sum of its proper divisors (17508658119).

26555572281 is a wasteful number, since it uses less digits than its factorization.

26555572281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295069.

The product of its digits is 1680000, while the sum is 48.

The spelling of 26555572281 in words is "twenty-six billion, five hundred fifty-five million, five hundred seventy-two thousand, two hundred eighty-one".