125649346638 has 16 divisors (see below), whose sum is σ = 256645474560. Its totient is φ = 40991985336.

The previous prime is 125649346621. The next prime is 125649346657. The reversal of 125649346638 is 836643946521.

It is a congruent number.

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, 222782248 + ... + 222782811.

It is an arithmetic number, because the mean of its divisors is an integer number (16040342160).

Almost surely, 2^125649346638 is an apocalyptic number.

125649346638 is an abundant number, since it is smaller than the sum of its proper divisors (130996127922).

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

125649346638 is a wasteful number, since it uses less digits than its factorization.

125649346638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445565111.

The product of its digits is 22394880, while the sum is 57.

The spelling of 125649346638 in words is "one hundred twenty-five billion, six hundred forty-nine million, three hundred forty-six thousand, six hundred thirty-eight".