126429252681 has 32 divisors (see below), whose sum is σ = 170947302400. Its totient is φ = 83109499200.

The previous prime is 126429252661. The next prime is 126429252727. The reversal of 126429252681 is 186252924621.

It is not a de Polignac number, because 126429252681 - 2¹⁰ = 126429251657 is a prime.

It is a super-2 number, since 2×126429252681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126429252681.

It is not an unprimeable number, because it can be changed into a prime (126429252661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36007716 + ... + 36011226.

It is an arithmetic number, because the mean of its divisors is an integer number (5342103200).

Almost surely, 2^126429252681 is an apocalyptic number.

It is an amenable number.

126429252681 is a deficient number, since it is larger than the sum of its proper divisors (44518049719).

126429252681 is a wasteful number, since it uses less digits than its factorization.

126429252681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237.

The product of its digits is 829440, while the sum is 48.

The spelling of 126429252681 in words is "one hundred twenty-six billion, four hundred twenty-nine million, two hundred fifty-two thousand, six hundred eighty-one".