126563798915 has 4 divisors (see below), whose sum is σ = 151876558704. Its totient is φ = 101251039128.

The previous prime is 126563798873. The next prime is 126563798917. The reversal of 126563798915 is 519897365621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126563798915 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126563798917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12656379887 + ... + 12656379896.

It is an arithmetic number, because the mean of its divisors is an integer number (37969139676).

Almost surely, 2^126563798915 is an apocalyptic number.

126563798915 is a deficient number, since it is larger than the sum of its proper divisors (25312759789).

126563798915 is an equidigital number, since it uses as much as digits as its factorization.

126563798915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25312759788.

The product of its digits is 24494400, while the sum is 62.

The spelling of 126563798915 in words is "one hundred twenty-six billion, five hundred sixty-three million, seven hundred ninety-eight thousand, nine hundred fifteen".