155685568888081 has 4 divisors (see below), whose sum is σ = 163879546198000. Its totient is φ = 147491591578164.

The previous prime is 155685568888079. The next prime is 155685568888093. The reversal of 155685568888081 is 180888865586551.

155685568888081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 155685568888081 - 2¹ = 155685568888079 is a prime.

It is a super-2 number, since 2×155685568888081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155685568887986 and 155685568888004.

It is not an unprimeable number, because it can be changed into a prime (155685568888001) 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, 4096988654931 + ... + 4096988654968.

It is an arithmetic number, because the mean of its divisors is an integer number (40969886549500).

Almost surely, 2^{155685568888081} is an apocalyptic number.

It is an amenable number.

155685568888081 is a deficient number, since it is larger than the sum of its proper divisors (8193977309919).

155685568888081 is an equidigital number, since it uses as much as digits as its factorization.

155685568888081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193977309918.

The product of its (nonzero) digits is 5898240000, while the sum is 82.

The spelling of 155685568888081 in words is "one hundred fifty-five trillion, six hundred eighty-five billion, five hundred sixty-eight million, eight hundred eighty-eight thousand, eighty-one".