15493325478 has 32 divisors (see below), whose sum is σ = 31103471616. Its totient is φ = 5145009408.

The previous prime is 15493325459. The next prime is 15493325531. The reversal of 15493325478 is 87452339451.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15493325478.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1865451 + ... + 1873737.

It is an arithmetic number, because the mean of its divisors is an integer number (971983488).

Almost surely, 2^15493325478 is an apocalyptic number.

15493325478 is an abundant number, since it is smaller than the sum of its proper divisors (15610146138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15493325478 is a wasteful number, since it uses less digits than its factorization.

15493325478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9428.

The product of its digits is 3628800, while the sum is 51.

The spelling of 15493325478 in words is "fifteen billion, four hundred ninety-three million, three hundred twenty-five thousand, four hundred seventy-eight".