161771002 has 8 divisors (see below), whose sum is σ = 242827200. Its totient is φ = 80828604.

The previous prime is 161770991. The next prime is 161771003. The reversal of 161771002 is 200177161.

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 (161771003) 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, 24802 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (30353400).

Almost surely, 2^161771002 is an apocalyptic number.

161771002 is a deficient number, since it is larger than the sum of its proper divisors (81056198).

161771002 is a wasteful number, since it uses less digits than its factorization.

161771002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56900.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 161771002 is about 12718.9229889956. The cubic root of 161771002 is about 544.8791943895.

The spelling of 161771002 in words is "one hundred sixty-one million, seven hundred seventy-one thousand, two".