15523938487 has 2 divisors, whose sum is σ = 15523938488. Its totient is φ = 15523938486.

The previous prime is 15523938439. The next prime is 15523938497. The reversal of 15523938487 is 78483932551.

15523938487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (78483932551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15523938487 is a prime.

It is a super-2 number, since 2×15523938487² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15523938497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7761969243 + 7761969244.

It is an arithmetic number, because the mean of its divisors is an integer number (7761969244).

Almost surely, 2^15523938487 is an apocalyptic number.

15523938487 is a deficient number, since it is larger than the sum of its proper divisors (1).

15523938487 is an equidigital number, since it uses as much as digits as its factorization.

15523938487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 55.

The spelling of 15523938487 in words is "fifteen billion, five hundred twenty-three million, nine hundred thirty-eight thousand, four hundred eighty-seven".