161036553 has 4 divisors (see below), whose sum is σ = 214715408. Its totient is φ = 107357700.

The previous prime is 161036549. The next prime is 161036567. The reversal of 161036553 is 355630161.

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 not a de Polignac number, because 161036553 - 2² = 161036549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161036553.

It is not an unprimeable number, because it can be changed into a prime (161036503) 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, 26839423 + ... + 26839428.

It is an arithmetic number, because the mean of its divisors is an integer number (53678852).

Almost surely, 2^161036553 is an apocalyptic number.

It is an amenable number.

161036553 is a deficient number, since it is larger than the sum of its proper divisors (53678855).

161036553 is an equidigital number, since it uses as much as digits as its factorization.

161036553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53678854.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 161036553 is about 12690.0178486872. The cubic root of 161036553 is about 544.0533497725.

The spelling of 161036553 in words is "one hundred sixty-one million, thirty-six thousand, five hundred fifty-three".