15481215478 has 16 divisors (see below), whose sum is σ = 24594255504. Its totient is φ = 7283368960.

The previous prime is 15481215443. The next prime is 15481215511. The reversal of 15481215478 is 87451218451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76518 + ... + 191878.

It is an arithmetic number, because the mean of its divisors is an integer number (1537140969).

Almost surely, 2^15481215478 is an apocalyptic number.

15481215478 is a deficient number, since it is larger than the sum of its proper divisors (9113040026).

15481215478 is a wasteful number, since it uses less digits than its factorization.

15481215478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119327.

The product of its digits is 358400, while the sum is 46.

The spelling of 15481215478 in words is "fifteen billion, four hundred eighty-one million, two hundred fifteen thousand, four hundred seventy-eight".