126209266687 has 16 divisors (see below), whose sum is σ = 152819680320. Its totient is φ = 101751971328.

The previous prime is 126209266669. The next prime is 126209266751. The reversal of 126209266687 is 786662902621.

It is a de Polignac number, because none of the positive numbers 2^k-126209266687 is a prime.

It is a super-5 number, since 5×126209266687⁵ (a number of 57 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126209296687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142012 + ... + 522097.

It is an arithmetic number, because the mean of its divisors is an integer number (9551230020).

Almost surely, 2^126209266687 is an apocalyptic number.

126209266687 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

126209266687 is a deficient number, since it is larger than the sum of its proper divisors (26610413633).

126209266687 is a wasteful number, since it uses less digits than its factorization.

126209266687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665730.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 126209266687 in words is "one hundred twenty-six billion, two hundred nine million, two hundred sixty-six thousand, six hundred eighty-seven".