15478279803 has 48 divisors (see below), whose sum is σ = 25896499200. Its totient is φ = 8725993920.

The previous prime is 15478279787. The next prime is 15478279807. The reversal of 15478279803 is 30897287451.

It is a happy number.

15478279803 is a `hidden beast` number, since 1 + 547 + 8 + 2 + 7 + 98 + 0 + 3 = 666.

It is not a de Polignac number, because 15478279803 - 2⁴ = 15478279787 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 15478279803.

It is not an unprimeable number, because it can be changed into a prime (15478279807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1636498 + ... + 1645928.

It is an arithmetic number, because the mean of its divisors is an integer number (539510400).

Almost surely, 2^15478279803 is an apocalyptic number.

15478279803 is a deficient number, since it is larger than the sum of its proper divisors (10418219397).

15478279803 is a wasteful number, since it uses less digits than its factorization.

15478279803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9792 (or 9789 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 15478279803 in words is "fifteen billion, four hundred seventy-eight million, two hundred seventy-nine thousand, eight hundred three".