11945785477 has 4 divisors (see below), whose sum is σ = 11946049056. Its totient is φ = 11945521900.

The previous prime is 11945785457. The next prime is 11945785483. The reversal of 11945785477 is 77458754911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11945785477 - 2¹¹ = 11945783429 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 (11945785457) 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, 44563 + ... + 160864.

It is an arithmetic number, because the mean of its divisors is an integer number (2986512264).

Almost surely, 2^11945785477 is an apocalyptic number.

It is an amenable number.

11945785477 is a deficient number, since it is larger than the sum of its proper divisors (263579).

11945785477 is an equidigital number, since it uses as much as digits as its factorization.

11945785477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263578.

The product of its digits is 9878400, while the sum is 58.

The spelling of 11945785477 in words is "eleven billion, nine hundred forty-five million, seven hundred eighty-five thousand, four hundred seventy-seven".