126638709794 has 8 divisors (see below), whose sum is σ = 189960083280. Its totient is φ = 63318682036.

The previous prime is 126638709787. The next prime is 126638709809. The reversal of 126638709794 is 497907836621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53624 + ... + 506115.

It is an arithmetic number, because the mean of its divisors is an integer number (23745010410).

Almost surely, 2^126638709794 is an apocalyptic number.

126638709794 is a deficient number, since it is larger than the sum of its proper divisors (63321373486).

126638709794 is a wasteful number, since it uses less digits than its factorization.

126638709794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672864.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 126638709794 in words is "one hundred twenty-six billion, six hundred thirty-eight million, seven hundred nine thousand, seven hundred ninety-four".