126726627621 has 16 divisors (see below), whose sum is σ = 185853031488. Its totient is φ = 76804014320.

The previous prime is 126726627563. The next prime is 126726627683.

126726627621 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 126726627621 - 2⁷ = 126726627493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126726627221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15864606 + ... + 15872591.

It is an arithmetic number, because the mean of its divisors is an integer number (11615814468).

Almost surely, 2^126726627621 is an apocalyptic number.

126726627621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126726627621 is a deficient number, since it is larger than the sum of its proper divisors (59126403867).

126726627621 is an equidigital number, since it uses as much as digits as its factorization.

126726627621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31737233 (or 31737211 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The spelling of 126726627621 in words is "one hundred twenty-six billion, seven hundred twenty-six million, six hundred twenty-seven thousand, six hundred twenty-one".