126831425956 has 9 divisors (see below), whose sum is σ = 221956241899. Its totient is φ = 63415356844.

The previous prime is 126831425953. The next prime is 126831425977. The reversal of 126831425956 is 659524138621.

It is a happy number.

The square root of 126831425956 is 356134.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×126831425956² (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 (126831425953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 623235 + ... + 801301.

Almost surely, 2^126831425956 is an apocalyptic number.

126831425956 is the 356134-th square number.

It is an amenable number.

126831425956 is a deficient number, since it is larger than the sum of its proper divisors (95124815943).

126831425956 is an frugal number, since it uses more digits than its factorization.

126831425956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356138 (or 178069 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The spelling of 126831425956 in words is "one hundred twenty-six billion, eight hundred thirty-one million, four hundred twenty-five thousand, nine hundred fifty-six".