15487488641 has 2 divisors, whose sum is σ = 15487488642. Its totient is φ = 15487488640.

The previous prime is 15487488623. The next prime is 15487488691. The reversal of 15487488641 is 14688478451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15060198400 + 427290241 = 122720^2 + 20671^2 .

It is an emirp because it is prime and its reverse (14688478451) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15487488641 is a prime.

It is not a weakly prime, because it can be changed into another prime (15487488691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7743744320 + 7743744321.

It is an arithmetic number, because the mean of its divisors is an integer number (7743744321).

Almost surely, 2^15487488641 is an apocalyptic number.

It is an amenable number.

15487488641 is a deficient number, since it is larger than the sum of its proper divisors (1).

15487488641 is an equidigital number, since it uses as much as digits as its factorization.

15487488641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6881280, while the sum is 56.

The spelling of 15487488641 in words is "fifteen billion, four hundred eighty-seven million, four hundred eighty-eight thousand, six hundred forty-one".