161945498 has 32 divisors (see below), whose sum is σ = 287969472. Its totient is φ = 67334400.

The previous prime is 161945491. The next prime is 161945543. The reversal of 161945498 is 894549161.

It is not an unprimeable number, because it can be changed into a prime (161945491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29813 + ... + 34823.

It is an arithmetic number, because the mean of its divisors is an integer number (8999046).

Almost surely, 2^161945498 is an apocalyptic number.

161945498 is a deficient number, since it is larger than the sum of its proper divisors (126023974).

161945498 is a wasteful number, since it uses less digits than its factorization.

161945498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150.

The product of its digits is 311040, while the sum is 47.

The square root of 161945498 is about 12725.7808404828. The cubic root of 161945498 is about 545.0750372231.

The spelling of 161945498 in words is "one hundred sixty-one million, nine hundred forty-five thousand, four hundred ninety-eight".