126776677631 has 4 divisors (see below), whose sum is σ = 127688740200. Its totient is φ = 125864615064.

The previous prime is 126776677627. The next prime is 126776677669. The reversal of 126776677631 is 136776677621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126776677631 - 2² = 126776677627 is a prime.

It is a super-2 number, since 2×126776677631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126776677681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456031076 + ... + 456031353.

It is an arithmetic number, because the mean of its divisors is an integer number (31922185050).

Almost surely, 2^126776677631 is an apocalyptic number.

126776677631 is a deficient number, since it is larger than the sum of its proper divisors (912062569).

126776677631 is an equidigital number, since it uses as much as digits as its factorization.

126776677631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912062568.

The product of its digits is 18670176, while the sum is 59.

The spelling of 126776677631 in words is "one hundred twenty-six billion, seven hundred seventy-six million, six hundred seventy-seven thousand, six hundred thirty-one".