126138725394 has 16 divisors (see below), whose sum is σ = 275211764640. Its totient is φ = 38223856160.

The previous prime is 126138725369. The next prime is 126138725413. The reversal of 126138725394 is 493527831621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955596339 + ... + 955596470.

It is an arithmetic number, because the mean of its divisors is an integer number (17200735290).

Almost surely, 2^126138725394 is an apocalyptic number.

126138725394 is an abundant number, since it is smaller than the sum of its proper divisors (149073039246).

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

126138725394 is a wasteful number, since it uses less digits than its factorization.

126138725394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911192825.

The product of its digits is 2177280, while the sum is 51.

The spelling of 126138725394 in words is "one hundred twenty-six billion, one hundred thirty-eight million, seven hundred twenty-five thousand, three hundred ninety-four".