15643421515513 has 8 divisors (see below), whose sum is σ = 17065587358080. Its totient is φ = 14221261775280.

The previous prime is 15643421515483. The next prime is 15643421515543. The reversal of 15643421515513 is 31551512434651.

It is an interprime number because it is at equal distance from previous prime (15643421515483) and next prime (15643421515543).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15643421515513 - 2¹⁷ = 15643421384441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15643421515543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5076883 + ... + 7553911.

It is an arithmetic number, because the mean of its divisors is an integer number (2133198419760).

Almost surely, 2^{15643421515513} is an apocalyptic number.

It is an amenable number.

15643421515513 is a deficient number, since it is larger than the sum of its proper divisors (1422165842567).

15643421515513 is a wasteful number, since it uses less digits than its factorization.

15643421515513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051167.

The product of its digits is 1080000, while the sum is 46.

The spelling of 15643421515513 in words is "fifteen trillion, six hundred forty-three billion, four hundred twenty-one million, five hundred fifteen thousand, five hundred thirteen".