161156894 has 4 divisors (see below), whose sum is σ = 241735344. Its totient is φ = 80578446.

The previous prime is 161156893. The next prime is 161156899. The reversal of 161156894 is 498651161.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161156893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40289222 + ... + 40289225.

It is an arithmetic number, because the mean of its divisors is an integer number (60433836).

Almost surely, 2^161156894 is an apocalyptic number.

161156894 is a deficient number, since it is larger than the sum of its proper divisors (80578450).

161156894 is an equidigital number, since it uses as much as digits as its factorization.

161156894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80578449.

The product of its digits is 51840, while the sum is 41.

The square root of 161156894 is about 12694.7585246825. The cubic root of 161156894 is about 544.1888378980.

The spelling of 161156894 in words is "one hundred sixty-one million, one hundred fifty-six thousand, eight hundred ninety-four".