126792971819 has 16 divisors (see below), whose sum is σ = 137316912768. Its totient is φ = 116627177472.

The previous prime is 126792971813. The next prime is 126792971821. The reversal of 126792971819 is 918179297621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126792971819 is a prime.

It is a super-2 number, since 2×126792971819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126792971813) 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, 42227 + ... + 505340.

It is an arithmetic number, because the mean of its divisors is an integer number (8582307048).

Almost surely, 2^126792971819 is an apocalyptic number.

126792971819 is a deficient number, since it is larger than the sum of its proper divisors (10523940949).

126792971819 is a wasteful number, since it uses less digits than its factorization.

126792971819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547894.

The product of its digits is 6858432, while the sum is 62.

The spelling of 126792971819 in words is "one hundred twenty-six billion, seven hundred ninety-two million, nine hundred seventy-one thousand, eight hundred nineteen".