161650313404 has 6 divisors (see below), whose sum is σ = 282888048464. Its totient is φ = 80825156700.

The previous prime is 161650313401. The next prime is 161650313413. The reversal of 161650313404 is 404313056161.

It is a super-2 number, since 2×161650313404² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161650313404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161650313401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20206289172 + ... + 20206289179.

Almost surely, 2^161650313404 is an apocalyptic number.

It is an amenable number.

161650313404 is a deficient number, since it is larger than the sum of its proper divisors (121237735060).

161650313404 is a wasteful number, since it uses less digits than its factorization.

161650313404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40412578355 (or 40412578353 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 161650313404 its reverse (404313056161), we get a palindrome (565963369565).

The spelling of 161650313404 in words is "one hundred sixty-one billion, six hundred fifty million, three hundred thirteen thousand, four hundred four".