161788498 has 8 divisors (see below), whose sum is σ = 243559692. Its totient is φ = 80601936.

The previous prime is 161788483. The next prime is 161788499. The reversal of 161788498 is 894887161.

It is a happy number.

161788498 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133240849 + 28547649 = 11543^2 + 5343^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161788499) 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, 145465 + ... + 146572.

Almost surely, 2^161788498 is an apocalyptic number.

161788498 is a deficient number, since it is larger than the sum of its proper divisors (81771194).

161788498 is a wasteful number, since it uses less digits than its factorization.

161788498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292316.

The product of its digits is 774144, while the sum is 52.

The square root of 161788498 is about 12719.6107644849. The cubic root of 161788498 is about 544.8988370996.

The spelling of 161788498 in words is "one hundred sixty-one million, seven hundred eighty-eight thousand, four hundred ninety-eight".