126637764139 has 4 divisors (see below), whose sum is σ = 133302909640. Its totient is φ = 119972618640.

The previous prime is 126637764091. The next prime is 126637764179. The reversal of 126637764139 is 931467736621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931467736621 = 762791 ⋅1221131.

It is a cyclic number.

It is not a de Polignac number, because 126637764139 - 2⁹ = 126637763627 is a prime.

It is a super-2 number, since 2×126637764139² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126637764139.

It is not an unprimeable number, because it can be changed into a prime (126637764179) 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, 3332572722 + ... + 3332572759.

It is an arithmetic number, because the mean of its divisors is an integer number (33325727410).

Almost surely, 2^126637764139 is an apocalyptic number.

126637764139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126637764139 is a deficient number, since it is larger than the sum of its proper divisors (6665145501).

126637764139 is an equidigital number, since it uses as much as digits as its factorization.

126637764139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665145500.

The product of its digits is 6858432, while the sum is 55.

The spelling of 126637764139 in words is "one hundred twenty-six billion, six hundred thirty-seven million, seven hundred sixty-four thousand, one hundred thirty-nine".