15625074487 has 12 divisors (see below), whose sum is σ = 17392080160. Its totient is φ = 14024799360.

The previous prime is 15625074481. The next prime is 15625074511. The reversal of 15625074487 is 78447052651.

It is not a de Polignac number, because 15625074487 - 2¹⁹ = 15624550199 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15625074487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15625074481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 807738 + ... + 826855.

Almost surely, 2^15625074487 is an apocalyptic number.

15625074487 is a deficient number, since it is larger than the sum of its proper divisors (1767005673).

15625074487 is a wasteful number, since it uses less digits than its factorization.

15625074487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634694 (or 1634683 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 15625074487 in words is "fifteen billion, six hundred twenty-five million, seventy-four thousand, four hundred eighty-seven".