126438895815 has 12 divisors (see below), whose sum is σ = 202304436792. Its totient is φ = 67433343280.

The previous prime is 126438895799. The next prime is 126438895823. The reversal of 126438895815 is 518598834621.

It is not a de Polignac number, because 126438895815 - 2⁴ = 126438895799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1331260 + ... + 1423070.

It is an arithmetic number, because the mean of its divisors is an integer number (16858703066).

Almost surely, 2^126438895815 is an apocalyptic number.

126438895815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

126438895815 is a deficient number, since it is larger than the sum of its proper divisors (75865540977).

126438895815 is an frugal number, since it uses more digits than its factorization.

126438895815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183630 (or 91819 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 60.

Multiplying 126438895815 by its sum of digits (60), we get a square (7586333748900 = 2754330²).

The spelling of 126438895815 in words is "one hundred twenty-six billion, four hundred thirty-eight million, eight hundred ninety-five thousand, eight hundred fifteen".