126687786621 has 96 divisors (see below), whose sum is σ = 195860047488. Its totient is φ = 72705600000.

The previous prime is 126687786613. The next prime is 126687786647.

126687786621 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 126687786621 - 2³ = 126687786613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126687786721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82747626 + ... + 82749156.

It is an arithmetic number, because the mean of its divisors is an integer number (2040208828).

Almost surely, 2^126687786621 is an apocalyptic number.

126687786621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126687786621 is a deficient number, since it is larger than the sum of its proper divisors (69172260867).

126687786621 is a wasteful number, since it uses less digits than its factorization.

126687786621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755 (or 1744 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 60.

The spelling of 126687786621 in words is "one hundred twenty-six billion, six hundred eighty-seven million, seven hundred eighty-six thousand, six hundred twenty-one".