12354451999 has 4 divisors (see below), whose sum is σ = 12355705960. Its totient is φ = 12353198040.

The previous prime is 12354451987. The next prime is 12354452009. The reversal of 12354451999 is 99915445321.

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

It is a cyclic number.

It is not a de Polignac number, because 12354451999 - 2¹³ = 12354443807 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 (12354451799) 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, 612084 + ... + 631945.

It is an arithmetic number, because the mean of its divisors is an integer number (3088926490).

Almost surely, 2^12354451999 is an apocalyptic number.

12354451999 is a deficient number, since it is larger than the sum of its proper divisors (1253961).

12354451999 is an equidigital number, since it uses as much as digits as its factorization.

12354451999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253960.

The product of its digits is 1749600, while the sum is 52.

The spelling of 12354451999 in words is "twelve billion, three hundred fifty-four million, four hundred fifty-one thousand, nine hundred ninety-nine".