15501316401 has 24 divisors (see below), whose sum is σ = 22768584384. Its totient is φ = 10160004960.

The previous prime is 15501316381. The next prime is 15501316403. The reversal of 15501316401 is 10461310551.

15501316401 is a `hidden beast` number, since 1 + 5 + 5 + 0 + 13 + 1 + 640 + 1 = 666.

It is not a de Polignac number, because 15501316401 - 2¹³ = 15501308209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15501316403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1447870 + ... + 1458536.

It is an arithmetic number, because the mean of its divisors is an integer number (948691016).

Almost surely, 2^15501316401 is an apocalyptic number.

It is an amenable number.

15501316401 is a deficient number, since it is larger than the sum of its proper divisors (7267267983).

15501316401 is a wasteful number, since it uses less digits than its factorization.

15501316401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13381 (or 13378 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 15501316401 its reverse (10461310551), we get a palindrome (25962626952).

The spelling of 15501316401 in words is "fifteen billion, five hundred one million, three hundred sixteen thousand, four hundred one".