161545498 has 4 divisors (see below), whose sum is σ = 242318250. Its totient is φ = 80772748.

The previous prime is 161545493. The next prime is 161545499. The reversal of 161545498 is 894545161.

161545498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127170729 + 34374769 = 11277^2 + 5863^2 .

It is a super-3 number, since 3×161545498³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161545493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40386373 + ... + 40386376.

Almost surely, 2^161545498 is an apocalyptic number.

161545498 is a deficient number, since it is larger than the sum of its proper divisors (80772752).

161545498 is an equidigital number, since it uses as much as digits as its factorization.

161545498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80772751.

The product of its digits is 172800, while the sum is 43.

The square root of 161545498 is about 12710.0549959471. The cubic root of 161545498 is about 544.6258948197.

The spelling of 161545498 in words is "one hundred sixty-one million, five hundred forty-five thousand, four hundred ninety-eight".