161747648784 has 30 divisors (see below), whose sum is σ = 452668767486. Its totient is φ = 53915882880.

The previous prime is 161747648773. The next prime is 161747648791. The reversal of 161747648784 is 487846747161.

It is a happy number.

161747648784 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 4 + 76 + 487 + 84 = 666.

It can be written as a sum of positive squares in only one way, i.e., 153742410000 + 8005238784 = 392100^2 + 89472^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561623637 + ... + 561623924.

Almost surely, 2^161747648784 is an apocalyptic number.

It is an amenable number.

161747648784 is an abundant number, since it is smaller than the sum of its proper divisors (290921118702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161747648784 is a wasteful number, since it uses less digits than its factorization.

161747648784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123247575 (or 1123247566 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 63.

The spelling of 161747648784 in words is "one hundred sixty-one billion, seven hundred forty-seven million, six hundred forty-eight thousand, seven hundred eighty-four".