115555660205523 has 4 divisors (see below), whose sum is σ = 154074213607368. Its totient is φ = 77037106803680.

The previous prime is 115555660205521. The next prime is 115555660205539. The reversal of 115555660205523 is 325502066555511.

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 115555660205523 - 2¹ = 115555660205521 is a prime.

It is a super-2 number, since 2×115555660205523² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115555660205521) 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, 19259276700918 + ... + 19259276700923.

It is an arithmetic number, because the mean of its divisors is an integer number (38518553401842).

Almost surely, 2^{115555660205523} is an apocalyptic number.

115555660205523 is a deficient number, since it is larger than the sum of its proper divisors (38518553401845).

115555660205523 is an equidigital number, since it uses as much as digits as its factorization.

115555660205523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38518553401844.

The product of its (nonzero) digits is 6750000, while the sum is 51.

The spelling of 115555660205523 in words is "one hundred fifteen trillion, five hundred fifty-five billion, six hundred sixty million, two hundred five thousand, five hundred twenty-three".