15625000087 has 2 divisors, whose sum is σ = 15625000088. Its totient is φ = 15625000086.

The previous prime is 15625000049. The next prime is 15625000109. The reversal of 15625000087 is 78000052651.

15625000087 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15625000087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15625000007) 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, 7812500043 + 7812500044.

It is an arithmetic number, because the mean of its divisors is an integer number (7812500044).

Almost surely, 2^15625000087 is an apocalyptic number.

15625000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

15625000087 is an equidigital number, since it uses as much as digits as its factorization.

15625000087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 15625000087 in words is "fifteen billion, six hundred twenty-five million, eighty-seven", and thus it is an aban number.