15432844394 has 32 divisors (see below), whose sum is σ = 26131533120. Its totient is φ = 6774768000.

The previous prime is 15432844393. The next prime is 15432844429. The reversal of 15432844394 is 49344823451.

It is not an unprimeable number, because it can be changed into a prime (15432844393) by changing a digit.

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, 7457 + ... + 175844.

It is an arithmetic number, because the mean of its divisors is an integer number (816610410).

Almost surely, 2^15432844394 is an apocalyptic number.

15432844394 is a deficient number, since it is larger than the sum of its proper divisors (10698688726).

15432844394 is a wasteful number, since it uses less digits than its factorization.

15432844394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183446.

The product of its digits is 1658880, while the sum is 47.

Adding to 15432844394 its sum of digits (47), we get a square (15432844441 = 124229²).

The spelling of 15432844394 in words is "fifteen billion, four hundred thirty-two million, eight hundred forty-four thousand, three hundred ninety-four".