15730878643 has 4 divisors (see below), whose sum is σ = 16027687728. Its totient is φ = 15434069560.

The previous prime is 15730878623. The next prime is 15730878649. The reversal of 15730878643 is 34687803751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34687803751 = 127 ⋅273132313.

It is a cyclic number.

It is not a de Polignac number, because 15730878643 - 2⁹ = 15730878131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15730878649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148404463 + ... + 148404568.

It is an arithmetic number, because the mean of its divisors is an integer number (4006921932).

Almost surely, 2^15730878643 is an apocalyptic number.

15730878643 is a deficient number, since it is larger than the sum of its proper divisors (296809085).

15730878643 is an equidigital number, since it uses as much as digits as its factorization.

15730878643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296809084.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 15730878643 in words is "fifteen billion, seven hundred thirty million, eight hundred seventy-eight thousand, six hundred forty-three".