126677891531 has 8 divisors (see below), whose sum is σ = 134951718720. Its totient is φ = 118564721352.

The previous prime is 126677891521. The next prime is 126677891617. The reversal of 126677891531 is 135198776621.

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 126677891531 - 2⁶ = 126677891467 is a prime.

It is a super-2 number, since 2×126677891531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126677891521) 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, 40162625 + ... + 40165778.

It is an arithmetic number, because the mean of its divisors is an integer number (16868964840).

Almost surely, 2^126677891531 is an apocalyptic number.

126677891531 is a deficient number, since it is larger than the sum of its proper divisors (8273827189).

126677891531 is an equidigital number, since it uses as much as digits as its factorization.

126677891531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80328505.

The product of its digits is 3810240, while the sum is 56.

The spelling of 126677891531 in words is "one hundred twenty-six billion, six hundred seventy-seven million, eight hundred ninety-one thousand, five hundred thirty-one".