163580611401 has 15 divisors (see below), whose sum is σ = 244366597981. Its totient is φ = 109051314228.

The previous prime is 163580611343. The next prime is 163580611423. The reversal of 163580611401 is 104116085361.

It is a happy number.

The square root of 163580611401 is 404451.

It is a perfect power (a square), and thus also a powerful number.

163580611401 is a `hidden beast` number, since 1 + 6 + 3 + 580 + 61 + 14 + 0 + 1 = 666.

It is not a de Polignac number, because 163580611401 - 2¹⁹ = 163580087113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163580616401) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3617590 + ... + 3662528.

Almost surely, 2^163580611401 is an apocalyptic number.

163580611401 is the 404451-st square number.

163580611401 is the 202226-th centered octagonal number.

It is an amenable number.

163580611401 is a deficient number, since it is larger than the sum of its proper divisors (80785986580).

163580611401 is an frugal number, since it uses more digits than its factorization.

163580611401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89890 (or 44942 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Multiplying 163580611401 by its sum of digits (36), we get a square (5888902010436 = 2426706²).

Adding to 163580611401 its reverse (104116085361), we get a palindrome (267696696762).

The spelling of 163580611401 in words is "one hundred sixty-three billion, five hundred eighty million, six hundred eleven thousand, four hundred one".