126640742727 has 32 divisors (see below), whose sum is σ = 182452999680. Its totient is φ = 77894087040.

The previous prime is 126640742717. The next prime is 126640742759. The reversal of 126640742727 is 727247046621.

It is not a de Polignac number, because 126640742727 - 2¹⁴ = 126640726343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126640742717) 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, 2012028 + ... + 2074014.

It is an arithmetic number, because the mean of its divisors is an integer number (5701656240).

Almost surely, 2^126640742727 is an apocalyptic number.

126640742727 is a deficient number, since it is larger than the sum of its proper divisors (55812256953).

126640742727 is a wasteful number, since it uses less digits than its factorization.

126640742727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63063.

The product of its (nonzero) digits is 1580544, while the sum is 48.

The spelling of 126640742727 in words is "one hundred twenty-six billion, six hundred forty million, seven hundred forty-two thousand, seven hundred twenty-seven".