11999999945 has 8 divisors (see below), whose sum is σ = 14419178880. Its totient is φ = 9587214000.

The previous prime is 11999999923. The next prime is 11999999983. The reversal of 11999999945 is 54999999911.

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

It is not a de Polignac number, because 11999999945 - 2¹² = 11999995849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594115 + ... + 1601624.

It is an arithmetic number, because the mean of its divisors is an integer number (1802397360).

Almost surely, 2^11999999945 is an apocalyptic number.

It is an amenable number.

11999999945 is a deficient number, since it is larger than the sum of its proper divisors (2419178935).

11999999945 is an equidigital number, since it uses as much as digits as its factorization.

11999999945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196495.

The product of its digits is 95659380, while the sum is 74.

The spelling of 11999999945 in words is "eleven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-five".