15138777625 has 16 divisors (see below), whose sum is σ = 19105491600. Its totient is φ = 11974934400.

The previous prime is 15138777601. The next prime is 15138777673. The reversal of 15138777625 is 52677783151.

15138777625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 9816053776 + 5322723849 = 99076^2 + 72957^2 .

It is not a de Polignac number, because 15138777625 - 2¹⁵ = 15138744857 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 669270 + ... + 691519.

It is an arithmetic number, because the mean of its divisors is an integer number (1194093225).

Almost surely, 2^15138777625 is an apocalyptic number.

It is an amenable number.

15138777625 is a deficient number, since it is larger than the sum of its proper divisors (3966713975).

15138777625 is an equidigital number, since it uses as much as digits as its factorization.

15138777625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360893 (or 1360883 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 52.

The spelling of 15138777625 in words is "fifteen billion, one hundred thirty-eight million, seven hundred seventy-seven thousand, six hundred twenty-five".