126915093917 has 4 divisors (see below), whose sum is σ = 126915806556. Its totient is φ = 126914381280.

The previous prime is 126915093859. The next prime is 126915093919. The reversal of 126915093917 is 719390519621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 719390519621 = 547 ⋅1315156343.

It can be written as a sum of positive squares in 2 ways, for example, as 118098071716 + 8817022201 = 343654^2 + 93899^2 .

It is a cyclic number.

It is not a de Polignac number, because 126915093917 - 2³⁰ = 125841352093 is a prime.

It is a super-2 number, since 2×126915093917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126915093919) 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, 167753 + ... + 531009.

It is an arithmetic number, because the mean of its divisors is an integer number (31728951639).

Almost surely, 2^126915093917 is an apocalyptic number.

It is an amenable number.

126915093917 is a deficient number, since it is larger than the sum of its proper divisors (712639).

126915093917 is an equidigital number, since it uses as much as digits as its factorization.

126915093917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712638.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 126915093917 in words is "one hundred twenty-six billion, nine hundred fifteen million, ninety-three thousand, nine hundred seventeen".