125044728638 has 4 divisors (see below), whose sum is σ = 187567092960. Its totient is φ = 62522364318.

The previous prime is 125044728619. The next prime is 125044728661. The reversal of 125044728638 is 836827440521.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31261182158 + ... + 31261182161.

It is an arithmetic number, because the mean of its divisors is an integer number (46891773240).

Almost surely, 2^125044728638 is an apocalyptic number.

125044728638 is a deficient number, since it is larger than the sum of its proper divisors (62522364322).

125044728638 is an equidigital number, since it uses as much as digits as its factorization.

125044728638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62522364321.

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 125044728638 in words is "one hundred twenty-five billion, forty-four million, seven hundred twenty-eight thousand, six hundred thirty-eight".