125853759091 has 4 divisors (see below), whose sum is σ = 125892738400. Its totient is φ = 125814779784.

The previous prime is 125853758993. The next prime is 125853759103. The reversal of 125853759091 is 190957358521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125853759091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125857759091) 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, 19484811 + ... + 19491268.

It is an arithmetic number, because the mean of its divisors is an integer number (31473184600).

Almost surely, 2^125853759091 is an apocalyptic number.

125853759091 is a deficient number, since it is larger than the sum of its proper divisors (38979309).

125853759091 is an equidigital number, since it uses as much as digits as its factorization.

125853759091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38979308.

The product of its (nonzero) digits is 3402000, while the sum is 55.

The spelling of 125853759091 in words is "one hundred twenty-five billion, eight hundred fifty-three million, seven hundred fifty-nine thousand, ninety-one".