161378847 has 24 divisors (see below), whose sum is σ = 266739200. Its totient is φ = 92100240.

The previous prime is 161378843. The next prime is 161378849. The reversal of 161378847 is 748873161.

It is not a de Polignac number, because 161378847 - 2² = 161378843 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161378843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87222 + ... + 89052.

Almost surely, 2^161378847 is an apocalyptic number.

161378847 is a deficient number, since it is larger than the sum of its proper divisors (105360353).

161378847 is a wasteful number, since it uses less digits than its factorization.

161378847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3240 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 161378847 is about 12703.4974318099. The cubic root of 161378847 is about 544.4385509458.

The spelling of 161378847 in words is "one hundred sixty-one million, three hundred seventy-eight thousand, eight hundred forty-seven".