126657756631 has 8 divisors (see below), whose sum is σ = 144762919200. Its totient is φ = 108555393408.

The previous prime is 126657756587. The next prime is 126657756649. The reversal of 126657756631 is 136657756621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126657756631 - 2⁹ = 126657756119 is a prime.

It is a super-2 number, since 2×126657756631² (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 (126657750631) 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, 601966 + ... + 784651.

It is an arithmetic number, because the mean of its divisors is an integer number (18095364900).

Almost surely, 2^126657756631 is an apocalyptic number.

126657756631 is a deficient number, since it is larger than the sum of its proper divisors (18105162569).

126657756631 is a wasteful number, since it uses less digits than its factorization.

126657756631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399673.

The product of its digits is 9525600, while the sum is 55.

The spelling of 126657756631 in words is "one hundred twenty-six billion, six hundred fifty-seven million, seven hundred fifty-six thousand, six hundred thirty-one".