15478897247 has 8 divisors (see below), whose sum is σ = 17007553920. Its totient is φ = 13970487960.

The previous prime is 15478897243. The next prime is 15478897249. The reversal of 15478897247 is 74279887451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15478897247 - 2² = 15478897243 is a prime.

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 15478897247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15478897241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5060243 + ... + 5063300.

It is an arithmetic number, because the mean of its divisors is an integer number (2125944240).

Almost surely, 2^15478897247 is an apocalyptic number.

15478897247 is a deficient number, since it is larger than the sum of its proper divisors (1528656673).

15478897247 is a wasteful number, since it uses less digits than its factorization.

15478897247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10123693.

The product of its digits is 31610880, while the sum is 62.

The spelling of 15478897247 in words is "fifteen billion, four hundred seventy-eight million, eight hundred ninety-seven thousand, two hundred forty-seven".