11205451999 has 8 divisors (see below), whose sum is σ = 12871238688. Its totient is φ = 9555917280.

The previous prime is 11205451981. The next prime is 11205452003. The reversal of 11205451999 is 99915450211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11205451999 - 2⁵ = 11205451967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11205451199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4061512 + ... + 4064269.

It is an arithmetic number, because the mean of its divisors is an integer number (1608904836).

Almost surely, 2^11205451999 is an apocalyptic number.

11205451999 is a deficient number, since it is larger than the sum of its proper divisors (1665786689).

11205451999 is an equidigital number, since it uses as much as digits as its factorization.

11205451999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125985.

The product of its (nonzero) digits is 145800, while the sum is 46.

The spelling of 11205451999 in words is "eleven billion, two hundred five million, four hundred fifty-one thousand, nine hundred ninety-nine".