155715655121161 has 4 divisors (see below), whose sum is σ = 155715691420800. Its totient is φ = 155715618821524.

The previous prime is 155715655121119. The next prime is 155715655121219. The reversal of 155715655121161 is 161121556517551.

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 155715655121161 - 2¹¹ = 155715655119113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155715655121099 and 155715655121108.

It is not an unprimeable number, because it can be changed into a prime (155715655121461) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10694401 + ... + 20634958.

It is an arithmetic number, because the mean of its divisors is an integer number (38928922855200).

Almost surely, 2^{155715655121161} is an apocalyptic number.

It is an amenable number.

155715655121161 is a deficient number, since it is larger than the sum of its proper divisors (36299639).

155715655121161 is an equidigital number, since it uses as much as digits as its factorization.

155715655121161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36299638.

The product of its digits is 1575000, while the sum is 52.

The spelling of 155715655121161 in words is "one hundred fifty-five trillion, seven hundred fifteen billion, six hundred fifty-five million, one hundred twenty-one thousand, one hundred sixty-one".