1399543894579 has 8 divisors (see below), whose sum is σ = 1417417607360. Its totient is φ = 1381674131136.

The previous prime is 1399543894561. The next prime is 1399543894741. The reversal of 1399543894579 is 9754983459931.

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 1399543894579 - 2²¹ = 1399541797427 is a prime.

It is a super-2 number, since 2×1399543894579² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399543894279) 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 7 ways as a sum of consecutive naturals, for example, 270762 + ... + 1694815.

It is an arithmetic number, because the mean of its divisors is an integer number (177177200920).

Almost surely, 2^{1399543894579} is an apocalyptic number.

1399543894579 is a deficient number, since it is larger than the sum of its proper divisors (17873712781).

1399543894579 is an equidigital number, since it uses as much as digits as its factorization.

1399543894579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974669.

The product of its digits is 1322697600, while the sum is 76.

The spelling of 1399543894579 in words is "one trillion, three hundred ninety-nine billion, five hundred forty-three million, eight hundred ninety-four thousand, five hundred seventy-nine".