11994122465 has 32 divisors (see below), whose sum is σ = 16030586880. Its totient is φ = 8558843904.

The previous prime is 11994122453. The next prime is 11994122471. The reversal of 11994122465 is 56422149911.

It is not a de Polignac number, because 11994122465 - 2¹⁰ = 11994121441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216497 + ... + 266193.

It is an arithmetic number, because the mean of its divisors is an integer number (500955840).

Almost surely, 2^11994122465 is an apocalyptic number.

It is an amenable number.

11994122465 is a deficient number, since it is larger than the sum of its proper divisors (4036464415).

11994122465 is a wasteful number, since it uses less digits than its factorization.

11994122465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49841.

The product of its digits is 155520, while the sum is 44.

The spelling of 11994122465 in words is "eleven billion, nine hundred ninety-four million, one hundred twenty-two thousand, four hundred sixty-five".