1428236375999 has 4 divisors (see below), whose sum is σ = 1447801257936. Its totient is φ = 1408671494064.

The previous prime is 1428236375989. The next prime is 1428236376037. The reversal of 1428236375999 is 9995736328241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428236375999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428236375959) 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, 9782440859 + ... + 9782441004.

It is an arithmetic number, because the mean of its divisors is an integer number (361950314484).

Almost surely, 2^{1428236375999} is an apocalyptic number.

1428236375999 is a deficient number, since it is larger than the sum of its proper divisors (19564881937).

1428236375999 is an equidigital number, since it uses as much as digits as its factorization.

1428236375999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564881936.

The product of its digits is 176359680, while the sum is 68.

The spelling of 1428236375999 in words is "one trillion, four hundred twenty-eight billion, two hundred thirty-six million, three hundred seventy-five thousand, nine hundred ninety-nine".