126642789534895 has 4 divisors (see below), whose sum is σ = 151971347441880. Its totient is φ = 101314231627912.

The previous prime is 126642789534853. The next prime is 126642789534901. The reversal of 126642789534895 is 598435987246621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126642789534895 - 2¹⁵ = 126642789502127 is a prime.

It is a super-2 number, since 2×126642789534895² (a number of 29 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 3 ways as a sum of consecutive naturals, for example, 12664278953485 + ... + 12664278953494.

It is an arithmetic number, because the mean of its divisors is an integer number (37992836860470).

Almost surely, 2^{126642789534895} is an apocalyptic number.

126642789534895 is a deficient number, since it is larger than the sum of its proper divisors (25328557906985).

126642789534895 is an equidigital number, since it uses as much as digits as its factorization.

126642789534895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25328557906984.

The product of its digits is 6270566400, while the sum is 79.

The spelling of 126642789534895 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-five".