11775406537 has 4 divisors (see below), whose sum is σ = 11779499520. Its totient is φ = 11771313556.

The previous prime is 11775406463. The next prime is 11775406543. The reversal of 11775406537 is 73560457711.

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 11775406537 - 2²⁷ = 11641188809 is a prime.

It is a super-2 number, since 2×11775406537² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11775407537) 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, 2042173 + ... + 2047930.

It is an arithmetic number, because the mean of its divisors is an integer number (2944874880).

Almost surely, 2^11775406537 is an apocalyptic number.

It is an amenable number.

11775406537 is a deficient number, since it is larger than the sum of its proper divisors (4092983).

11775406537 is an equidigital number, since it uses as much as digits as its factorization.

11775406537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4092982.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 11775406537 in words is "eleven billion, seven hundred seventy-five million, four hundred six thousand, five hundred thirty-seven".