161463638722 has 16 divisors (see below), whose sum is σ = 244188195840. Its totient is φ = 80068660128.

The previous prime is 161463638701. The next prime is 161463638723. The reversal of 161463638722 is 227836364161.

It is not an unprimeable number, because it can be changed into a prime (161463638723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26779 + ... + 568897.

It is an arithmetic number, because the mean of its divisors is an integer number (15261762240).

Almost surely, 2^161463638722 is an apocalyptic number.

161463638722 is a deficient number, since it is larger than the sum of its proper divisors (82724557118).

161463638722 is a wasteful number, since it uses less digits than its factorization.

161463638722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543345.

The product of its digits is 1741824, while the sum is 49.

The spelling of 161463638722 in words is "one hundred sixty-one billion, four hundred sixty-three million, six hundred thirty-eight thousand, seven hundred twenty-two".