15378424994 has 16 divisors (see below), whose sum is σ = 23350836600. Its totient is φ = 7595383680.

The previous prime is 15378424939. The next prime is 15378425009. The reversal of 15378424994 is 49942487351.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10214134225 + 5164290769 = 101065^2 + 71863^2 .

It is a Curzon 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, 88619 + ... + 196494.

Almost surely, 2^15378424994 is an apocalyptic number.

15378424994 is a deficient number, since it is larger than the sum of its proper divisors (7972411606).

15378424994 is a wasteful number, since it uses less digits than its factorization.

15378424994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285445.

The product of its digits is 8709120, while the sum is 56.

The spelling of 15378424994 in words is "fifteen billion, three hundred seventy-eight million, four hundred twenty-four thousand, nine hundred ninety-four".