11622940578 has 18 divisors (see below), whose sum is σ = 25184028987. Its totient is φ = 3874161060.

The previous prime is 11622940517. The next prime is 11622940597. The reversal of 11622940578 is 87504922611.

11622940578 is a `hidden beast` number, since 1 + 16 + 2 + 29 + 40 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5811470289 + 5811470289 = 76233^2 + 76233^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=76233.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 444693 + ... + 470103.

Almost surely, 2^11622940578 is an apocalyptic number.

11622940578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11622940578 is an abundant number, since it is smaller than the sum of its proper divisors (13561088409).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11622940578 is an frugal number, since it uses more digits than its factorization.

11622940578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50830 (or 25416 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 11622940578 in words is "eleven billion, six hundred twenty-two million, nine hundred forty thousand, five hundred seventy-eight".