126851656838 has 16 divisors (see below), whose sum is σ = 196674711120. Its totient is φ = 61328666400.

The previous prime is 126851656831. The next prime is 126851656843. The reversal of 126851656838 is 838656158621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126851656831) 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, 8804393 + ... + 8818788.

It is an arithmetic number, because the mean of its divisors is an integer number (12292169445).

Almost surely, 2^126851656838 is an apocalyptic number.

126851656838 is a deficient number, since it is larger than the sum of its proper divisors (69823054282).

126851656838 is a wasteful number, since it uses less digits than its factorization.

126851656838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17623303.

The product of its digits is 16588800, while the sum is 59.

The spelling of 126851656838 in words is "one hundred twenty-six billion, eight hundred fifty-one million, six hundred fifty-six thousand, eight hundred thirty-eight".