115854740488657 has 4 divisors (see below), whose sum is σ = 119849731540020. Its totient is φ = 111859749437296.

The previous prime is 115854740488651. The next prime is 115854740488667. The reversal of 115854740488657 is 756884047458511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99338677000641 + 16516063488016 = 9966879^2 + 4063996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115854740488657 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 115854740488657.

It is not an unprimeable number, because it can be changed into a prime (115854740488651) 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, 1997495525638 + ... + 1997495525695.

It is an arithmetic number, because the mean of its divisors is an integer number (29962432885005).

Almost surely, 2^{115854740488657} is an apocalyptic number.

It is an amenable number.

115854740488657 is a deficient number, since it is larger than the sum of its proper divisors (3994991051363).

115854740488657 is an equidigital number, since it uses as much as digits as its factorization.

115854740488657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994991051362.

The product of its (nonzero) digits is 1204224000, while the sum is 73.

The spelling of 115854740488657 in words is "one hundred fifteen trillion, eight hundred fifty-four billion, seven hundred forty million, four hundred eighty-eight thousand, six hundred fifty-seven".