26445205561131 has 24 divisors (see below), whose sum is σ = 45160942176480. Its totient is φ = 14590458239616.

The previous prime is 26445205561109. The next prime is 26445205561141. The reversal of 26445205561131 is 13116550254462.

26445205561131 is a `hidden beast` number, since 2 + 6 + 4 + 4 + 5 + 20 + 5 + 5 + 611 + 3 + 1 = 666.

It is not a de Polignac number, because 26445205561131 - 2⁹ = 26445205560619 is a prime.

It is a super-2 number, since 2×26445205561131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26445205561141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7237328650 + ... + 7237332303.

It is an arithmetic number, because the mean of its divisors is an integer number (1881705924020).

Almost surely, 2^{26445205561131} is an apocalyptic number.

26445205561131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

26445205561131 is a deficient number, since it is larger than the sum of its proper divisors (18715736615349).

26445205561131 is a wasteful number, since it uses less digits than its factorization.

26445205561131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14474660995 (or 14474660992 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 26445205561131 in words is "twenty-six trillion, four hundred forty-five billion, two hundred five million, five hundred sixty-one thousand, one hundred thirty-one".