126799685821 has 8 divisors (see below), whose sum is σ = 127817155584. Its totient is φ = 125782513920.

The previous prime is 126799685813. The next prime is 126799685839. The reversal of 126799685821 is 128586997621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126799685821 - 2³ = 126799685813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126799685801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823581 + ... + 965341.

It is an arithmetic number, because the mean of its divisors is an integer number (15977144448).

Almost surely, 2^126799685821 is an apocalyptic number.

It is an amenable number.

126799685821 is a deficient number, since it is larger than the sum of its proper divisors (1017469763).

126799685821 is a wasteful number, since it uses less digits than its factorization.

126799685821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148931.

The product of its digits is 26127360, while the sum is 64.

The spelling of 126799685821 in words is "one hundred twenty-six billion, seven hundred ninety-nine million, six hundred eighty-five thousand, eight hundred twenty-one".