161500694 has 4 divisors (see below), whose sum is σ = 242251044. Its totient is φ = 80750346.

The previous prime is 161500657. The next prime is 161500711. The reversal of 161500694 is 496005161.

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

It is a self number, because there is not a number n which added to its sum of digits gives 161500694.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 40375172 + ... + 40375175.

It is an arithmetic number, because the mean of its divisors is an integer number (60562761).

Almost surely, 2^161500694 is an apocalyptic number.

161500694 is a deficient number, since it is larger than the sum of its proper divisors (80750350).

161500694 is an equidigital number, since it uses as much as digits as its factorization.

161500694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80750349.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 161500694 is about 12708.2923321743. The cubic root of 161500694 is about 544.5755402238.

The spelling of 161500694 in words is "one hundred sixty-one million, five hundred thousand, six hundred ninety-four".