115620120557 has 4 divisors (see below), whose sum is σ = 121705390080. Its totient is φ = 109534851036.

The previous prime is 115620120529. The next prime is 115620120563. The reversal of 115620120557 is 755021026511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115620120557 - 2⁶ = 115620120493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115620120757) 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, 3042634733 + ... + 3042634770.

It is an arithmetic number, because the mean of its divisors is an integer number (30426347520).

Almost surely, 2^115620120557 is an apocalyptic number.

It is an amenable number.

115620120557 is a deficient number, since it is larger than the sum of its proper divisors (6085269523).

115620120557 is an equidigital number, since it uses as much as digits as its factorization.

115620120557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085269522.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 115620120557 in words is "one hundred fifteen billion, six hundred twenty million, one hundred twenty thousand, five hundred fifty-seven".