161021368 has 16 divisors (see below), whose sum is σ = 306422280. Its totient is φ = 79308768.

The previous prime is 161021363. The next prime is 161021431. The reversal of 161021368 is 863120161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161021363) 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, 149671 + ... + 150742.

Almost surely, 2^161021368 is an apocalyptic number.

It is an amenable number.

161021368 is a deficient number, since it is larger than the sum of its proper divisors (145400912).

161021368 is a wasteful number, since it uses less digits than its factorization.

161021368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300486 (or 300482 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 161021368 is about 12689.4195296712. The cubic root of 161021368 is about 544.0362486659.

The spelling of 161021368 in words is "one hundred sixty-one million, twenty-one thousand, three hundred sixty-eight".