126831531072 has 56 divisors (see below), whose sum is σ = 346400111872. Its totient is φ = 40913395200.

The previous prime is 126831531019. The next prime is 126831531089. The reversal of 126831531072 is 270135138621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126831531072.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648579 + ... + 10660482.

Almost surely, 2^126831531072 is an apocalyptic number.

126831531072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126831531072 is an abundant number, since it is smaller than the sum of its proper divisors (219568580800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126831531072 is a wasteful number, since it uses less digits than its factorization.

126831531072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21309107 (or 21309097 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

Adding to 126831531072 its reverse (270135138621), we get a palindrome (396966669693).

The spelling of 126831531072 in words is "one hundred twenty-six billion, eight hundred thirty-one million, five hundred thirty-one thousand, seventy-two".