161120553 has 16 divisors (see below), whose sum is σ = 236682432. Its totient is φ = 96680000.

The previous prime is 161120537. The next prime is 161120593. The reversal of 161120553 is 355021161.

It is a cyclic number.

It is not a de Polignac number, because 161120553 - 2⁴ = 161120537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161120503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20838 + ... + 27503.

It is an arithmetic number, because the mean of its divisors is an integer number (14792652).

Almost surely, 2^161120553 is an apocalyptic number.

It is an amenable number.

161120553 is a deficient number, since it is larger than the sum of its proper divisors (75561879).

161120553 is a wasteful number, since it uses less digits than its factorization.

161120553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48456.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 161120553 is about 12693.3271052156. The cubic root of 161120553 is about 544.1479298264.

The spelling of 161120553 in words is "one hundred sixty-one million, one hundred twenty thousand, five hundred fifty-three".