125138763899 has 4 divisors (see below), whose sum is σ = 125145504264. Its totient is φ = 125132023536.

The previous prime is 125138763863. The next prime is 125138763913. The reversal of 125138763899 is 998367831521.

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

It is a cyclic number.

It is not a de Polignac number, because 125138763899 - 2¹² = 125138759803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125138763829) by changing a digit.

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, 3342257 + ... + 3379490.

It is an arithmetic number, because the mean of its divisors is an integer number (31286376066).

Almost surely, 2^125138763899 is an apocalyptic number.

125138763899 is a deficient number, since it is larger than the sum of its proper divisors (6740365).

125138763899 is an equidigital number, since it uses as much as digits as its factorization.

125138763899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740364.

The product of its digits is 19595520, while the sum is 62.

The spelling of 125138763899 in words is "one hundred twenty-five billion, one hundred thirty-eight million, seven hundred sixty-three thousand, eight hundred ninety-nine".