15505143601 has 2 divisors, whose sum is σ = 15505143602. Its totient is φ = 15505143600.

The previous prime is 15505143593. The next prime is 15505143707. The reversal of 15505143601 is 10634150551.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11504707600 + 4000436001 = 107260^2 + 63249^2 .

It is a cyclic number.

It is not a de Polignac number, because 15505143601 - 2³ = 15505143593 is a prime.

It is not a weakly prime, because it can be changed into another prime (15505149601) 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 as a sum of consecutive naturals, namely, 7752571800 + 7752571801.

It is an arithmetic number, because the mean of its divisors is an integer number (7752571801).

Almost surely, 2^15505143601 is an apocalyptic number.

It is an amenable number.

15505143601 is a deficient number, since it is larger than the sum of its proper divisors (1).

15505143601 is an equidigital number, since it uses as much as digits as its factorization.

15505143601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 15505143601 in words is "fifteen billion, five hundred five million, one hundred forty-three thousand, six hundred one".