10399340543 has 4 divisors (see below), whose sum is σ = 10851485808. Its totient is φ = 9947195280.

The previous prime is 10399340537. The next prime is 10399340561. The reversal of 10399340543 is 34504399301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34504399301 = 72739 ⋅474359.

It is a cyclic number.

It is not a de Polignac number, because 10399340543 - 2¹⁰ = 10399339519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10399340543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10399340503) 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, 226072598 + ... + 226072643.

It is an arithmetic number, because the mean of its divisors is an integer number (2712871452).

Almost surely, 2^10399340543 is an apocalyptic number.

10399340543 is a deficient number, since it is larger than the sum of its proper divisors (452145265).

10399340543 is an equidigital number, since it uses as much as digits as its factorization.

10399340543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452145264.

The product of its (nonzero) digits is 174960, while the sum is 41.

The spelling of 10399340543 in words is "ten billion, three hundred ninety-nine million, three hundred forty thousand, five hundred forty-three".