125078591899 has 4 divisors (see below), whose sum is σ = 125079376464. Its totient is φ = 125077807336.

The previous prime is 125078591887. The next prime is 125078591933. The reversal of 125078591899 is 998195870521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 125078591899 - 2⁵ = 125078591867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125078591899.

It is not an unprimeable number, because it can be changed into a prime (125078591819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58447 + ... + 503560.

It is an arithmetic number, because the mean of its divisors is an integer number (31269844116).

Almost surely, 2^125078591899 is an apocalyptic number.

125078591899 is a deficient number, since it is larger than the sum of its proper divisors (784565).

125078591899 is an equidigital number, since it uses as much as digits as its factorization.

125078591899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784564.

The product of its (nonzero) digits is 16329600, while the sum is 64.

The spelling of 125078591899 in words is "one hundred twenty-five billion, seventy-eight million, five hundred ninety-one thousand, eight hundred ninety-nine".