15641385553 has 2 divisors, whose sum is σ = 15641385554. Its totient is φ = 15641385552.

The previous prime is 15641385481. The next prime is 15641385583. The reversal of 15641385553 is 35558314651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9918765649 + 5722619904 = 99593^2 + 75648^2 .

It is a cyclic number.

It is not a de Polignac number, because 15641385553 - 2²⁹ = 15104514641 is a prime.

It is not a weakly prime, because it can be changed into another prime (15641385583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7820692776 + 7820692777.

It is an arithmetic number, because the mean of its divisors is an integer number (7820692777).

Almost surely, 2^15641385553 is an apocalyptic number.

It is an amenable number.

15641385553 is a deficient number, since it is larger than the sum of its proper divisors (1).

15641385553 is an equidigital number, since it uses as much as digits as its factorization.

15641385553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080000, while the sum is 46.

The spelling of 15641385553 in words is "fifteen billion, six hundred forty-one million, three hundred eighty-five thousand, five hundred fifty-three".