15481430643 has 32 divisors (see below), whose sum is σ = 24154983936. Its totient is φ = 8637285888.

The previous prime is 15481430639. The next prime is 15481430677. The reversal of 15481430643 is 34603418451.

It is a happy number.

It is not a de Polignac number, because 15481430643 - 2² = 15481430639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15481430623) 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 31 ways as a sum of consecutive naturals, for example, 110305 + ... + 207677.

It is an arithmetic number, because the mean of its divisors is an integer number (754843248).

Almost surely, 2^15481430643 is an apocalyptic number.

15481430643 is a deficient number, since it is larger than the sum of its proper divisors (8673553293).

15481430643 is a wasteful number, since it uses less digits than its factorization.

15481430643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97563.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 15481430643 in words is "fifteen billion, four hundred eighty-one million, four hundred thirty thousand, six hundred forty-three".