126642789534897 has 12 divisors (see below), whose sum is σ = 184814334328260. Its totient is φ = 83558129177088.

The previous prime is 126642789534853. The next prime is 126642789534901. The reversal of 126642789534897 is 798435987246621.

126642789534897 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 4 + 2 + 7 + 89 + 53 + 489 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 97679836322721 + 28962953212176 = 9883311^2 + 5381724^2 .

It is not a de Polignac number, because 126642789534897 - 2¹⁹ = 126642789010609 is a prime.

It is a super-2 number, since 2×126642789534897² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (81) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (126642789534097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72533097372 + ... + 72533099117.

It is an arithmetic number, because the mean of its divisors is an integer number (15401194527355).

Almost surely, 2^{126642789534897} is an apocalyptic number.

It is an amenable number.

126642789534897 is a deficient number, since it is larger than the sum of its proper divisors (58171544793363).

126642789534897 is a wasteful number, since it uses less digits than its factorization.

126642789534897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145066196592 (or 145066196589 counting only the distinct ones).

The product of its digits is 8778792960, while the sum is 81.

The spelling of 126642789534897 in words is "one hundred twenty-six trillion, six hundred forty-two billion, seven hundred eighty-nine million, five hundred thirty-four thousand, eight hundred ninety-seven".