161145452553 has 8 divisors (see below), whose sum is σ = 215008686816. Its totient is φ = 107356260000.

The previous prime is 161145452467. The next prime is 161145452639. The reversal of 161145452553 is 355254541161.

It is an interprime number because it is at equal distance from previous prime (161145452467) and next prime (161145452639).

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

It is not a de Polignac number, because 161145452553 - 2⁸ = 161145452297 is a prime.

It is a super-2 number, since 2×161145452553² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161145452453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18505348 + ... + 18514053.

It is an arithmetic number, because the mean of its divisors is an integer number (26876085852).

Almost surely, 2^161145452553 is an apocalyptic number.

It is an amenable number.

161145452553 is a deficient number, since it is larger than the sum of its proper divisors (53863234263).

161145452553 is a wasteful number, since it uses less digits than its factorization.

161145452553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37020855.

The product of its digits is 360000, while the sum is 42.

The spelling of 161145452553 in words is "one hundred sixty-one billion, one hundred forty-five million, four hundred fifty-two thousand, five hundred fifty-three".