161295511553 has 8 divisors (see below), whose sum is σ = 175964671200. Its totient is φ = 146627340480.

The previous prime is 161295511549. The next prime is 161295511561. The reversal of 161295511553 is 355115592161.

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 161295511553 - 2² = 161295511549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161295511543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117401 + ... + 579977.

It is an arithmetic number, because the mean of its divisors is an integer number (21995583900).

Almost surely, 2^161295511553 is an apocalyptic number.

It is an amenable number.

161295511553 is a deficient number, since it is larger than the sum of its proper divisors (14669159647).

161295511553 is a wasteful number, since it uses less digits than its factorization.

161295511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494287.

The product of its digits is 202500, while the sum is 44.

The spelling of 161295511553 in words is "one hundred sixty-one billion, two hundred ninety-five million, five hundred eleven thousand, five hundred fifty-three".