155596085601855 has 128 divisors (see below), whose sum is σ = 257002255890432. Its totient is φ = 80349088555008.

The previous prime is 155596085601829. The next prime is 155596085601899. The reversal of 155596085601855 is 558106580695551.

It is a Cunningham number, because it is equal to 12473816²-1.

It is not a de Polignac number, because 155596085601855 - 2¹¹ = 155596085599807 is a prime.

It is a super-3 number, since 3×155596085601855³ (a number of 44 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 155596085601855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 35662634904 + ... + 35662639266.

It is an arithmetic number, because the mean of its divisors is an integer number (2007830124144).

Almost surely, 2^{155596085601855} is an apocalyptic number.

155596085601855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155596085601855 is a deficient number, since it is larger than the sum of its proper divisors (101406170288577).

155596085601855 is a wasteful number, since it uses less digits than its factorization.

155596085601855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937.

The product of its (nonzero) digits is 324000000, while the sum is 69.

The spelling of 155596085601855 in words is "one hundred fifty-five trillion, five hundred ninety-six billion, eighty-five million, six hundred one thousand, eight hundred fifty-five".