15642422487 has 48 divisors (see below), whose sum is σ = 23694827520. Its totient is φ = 10311652512.

The previous prime is 15642422479. The next prime is 15642422507. The reversal of 15642422487 is 78422424651.

15642422487 is a `hidden beast` number, since 1 + 564 + 2 + 4 + 2 + 2 + 4 + 87 = 666.

It is not a de Polignac number, because 15642422487 - 2³ = 15642422479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15642422447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12004278 + ... + 12005580.

It is an arithmetic number, because the mean of its divisors is an integer number (493642240).

Almost surely, 2^15642422487 is an apocalyptic number.

15642422487 is a deficient number, since it is larger than the sum of its proper divisors (8052405033).

15642422487 is a wasteful number, since it uses less digits than its factorization.

15642422487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1822 counting only the distinct ones).

The product of its digits is 860160, while the sum is 45.

The spelling of 15642422487 in words is "fifteen billion, six hundred forty-two million, four hundred twenty-two thousand, four hundred eighty-seven".