125138756945 has 8 divisors (see below), whose sum is σ = 155010589440. Its totient is φ = 96881618160.

The previous prime is 125138756929. The next prime is 125138757061. The reversal of 125138756945 is 549657831521.

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

It is not a de Polignac number, because 125138756945 - 2⁴ = 125138756929 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403673255 + ... + 403673564.

It is an arithmetic number, because the mean of its divisors is an integer number (19376323680).

Almost surely, 2^125138756945 is an apocalyptic number.

It is an amenable number.

125138756945 is a deficient number, since it is larger than the sum of its proper divisors (29871832495).

125138756945 is an equidigital number, since it uses as much as digits as its factorization.

125138756945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807346855.

The product of its digits is 9072000, while the sum is 56.

The spelling of 125138756945 in words is "one hundred twenty-five billion, one hundred thirty-eight million, seven hundred fifty-six thousand, nine hundred forty-five".