126938245757 has 4 divisors (see below), whose sum is σ = 133619206080. Its totient is φ = 120257285436.

The previous prime is 126938245747. The next prime is 126938245783. The reversal of 126938245757 is 757542839621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 757542839621 = 147617 ⋅5131813.

It is a cyclic number.

It is not a de Polignac number, because 126938245757 - 2³⁴ = 109758376573 is a prime.

It is a super-2 number, since 2×126938245757² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126938245696 and 126938245705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126938245747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3340480133 + ... + 3340480170.

It is an arithmetic number, because the mean of its divisors is an integer number (33404801520).

Almost surely, 2^126938245757 is an apocalyptic number.

It is an amenable number.

126938245757 is a deficient number, since it is larger than the sum of its proper divisors (6680960323).

126938245757 is an equidigital number, since it uses as much as digits as its factorization.

126938245757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680960322.

The product of its digits is 25401600, while the sum is 59.

The spelling of 126938245757 in words is "one hundred twenty-six billion, nine hundred thirty-eight million, two hundred forty-five thousand, seven hundred fifty-seven".