15543142402401 has 24 divisors (see below), whose sum is σ = 23543541189480. Its totient is φ = 9867729505536.

The previous prime is 15543142402373. The next prime is 15543142402423. The reversal of 15543142402401 is 10420424134551.

15543142402401 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 3 + 1 + 4 + 240 + 2 + 401 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1741924832400 + 13801217570001 = 1319820^2 + 3714999^2 .

It is not a de Polignac number, because 15543142402401 - 2¹⁴ = 15543142386017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15543142409401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407873206 + ... + 407911311.

It is an arithmetic number, because the mean of its divisors is an integer number (980980882895).

Almost surely, 2^{15543142402401} is an apocalyptic number.

It is an amenable number.

15543142402401 is a deficient number, since it is larger than the sum of its proper divisors (8000398787079).

15543142402401 is a wasteful number, since it uses less digits than its factorization.

15543142402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815784625 (or 815784622 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 15543142402401 its reverse (10420424134551), we get a palindrome (25963566536952).

The spelling of 15543142402401 in words is "fifteen trillion, five hundred forty-three billion, one hundred forty-two million, four hundred two thousand, four hundred one".