161893315255 has 8 divisors (see below), whose sum is σ = 222025118112. Its totient is φ = 111012559008.

The previous prime is 161893315253. The next prime is 161893315307. The reversal of 161893315255 is 552513398161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161893315255 - 2¹ = 161893315253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161893315199 and 161893315208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161893315253) 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 7 ways as a sum of consecutive naturals, for example, 2312761612 + ... + 2312761681.

It is an arithmetic number, because the mean of its divisors is an integer number (27753139764).

Almost surely, 2^161893315255 is an apocalyptic number.

161893315255 is a deficient number, since it is larger than the sum of its proper divisors (60131802857).

161893315255 is an equidigital number, since it uses as much as digits as its factorization.

161893315255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625523305.

The product of its digits is 972000, while the sum is 49.

The spelling of 161893315255 in words is "one hundred sixty-one billion, eight hundred ninety-three million, three hundred fifteen thousand, two hundred fifty-five".