161157026 has 4 divisors (see below), whose sum is σ = 241735542. Its totient is φ = 80578512.

The previous prime is 161157011. The next prime is 161157041. The reversal of 161157026 is 620751161.

161157026 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 is an interprime number because it is at equal distance from previous prime (161157011) and next prime (161157041).

It can be written as a sum of positive squares in only one way, i.e., 143976001 + 17181025 = 11999^2 + 4145^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161157026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40289255 + ... + 40289258.

Almost surely, 2^161157026 is an apocalyptic number.

161157026 is a deficient number, since it is larger than the sum of its proper divisors (80578516).

161157026 is an equidigital number, since it uses as much as digits as its factorization.

161157026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80578515.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 161157026 is about 12694.7637236776. The cubic root of 161157026 is about 544.1889864756.

The spelling of 161157026 in words is "one hundred sixty-one million, one hundred fifty-seven thousand, twenty-six".