11722634657 has 4 divisors (see below), whose sum is σ = 11921323440. Its totient is φ = 11523945876.

The previous prime is 11722634647. The next prime is 11722634669. The reversal of 11722634657 is 75643622711.

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 11722634657 - 2¹⁰ = 11722633633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11722634647) 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, 99344303 + ... + 99344420.

It is an arithmetic number, because the mean of its divisors is an integer number (2980330860).

Almost surely, 2^11722634657 is an apocalyptic number.

It is an amenable number.

11722634657 is a deficient number, since it is larger than the sum of its proper divisors (198688783).

11722634657 is an equidigital number, since it uses as much as digits as its factorization.

11722634657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198688782.

The product of its digits is 423360, while the sum is 44.

The spelling of 11722634657 in words is "eleven billion, seven hundred twenty-two million, six hundred thirty-four thousand, six hundred fifty-seven".