126772277621 has 16 divisors (see below), whose sum is σ = 143415835200. Its totient is φ = 111001296000.

The previous prime is 126772277591. The next prime is 126772277623.

126772277621 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 126772277621 - 2²² = 126768083317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126772277621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126772277623) 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, 355355 + ... + 616296.

It is an arithmetic number, because the mean of its divisors is an integer number (8963489700).

Almost surely, 2^126772277621 is an apocalyptic number.

126772277621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126772277621 is a deficient number, since it is larger than the sum of its proper divisors (16643557579).

126772277621 is a wasteful number, since it uses less digits than its factorization.

126772277621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972100.

The product of its digits is 1382976, while the sum is 50.

The spelling of 126772277621 in words is "one hundred twenty-six billion, seven hundred seventy-two million, two hundred seventy-seven thousand, six hundred twenty-one".