11622637591 has 4 divisors (see below), whose sum is σ = 11786336784. Its totient is φ = 11458938400.

The previous prime is 11622637589. The next prime is 11622637619. The reversal of 11622637591 is 19573622611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19573622611 = 31 ⋅631407181.

It is a cyclic number.

It is not a de Polignac number, because 11622637591 - 2¹ = 11622637589 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 (11622637561) 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, 81849490 + ... + 81849631.

It is an arithmetic number, because the mean of its divisors is an integer number (2946584196).

Almost surely, 2^11622637591 is an apocalyptic number.

11622637591 is a deficient number, since it is larger than the sum of its proper divisors (163699193).

11622637591 is an equidigital number, since it uses as much as digits as its factorization.

11622637591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163699192.

The product of its digits is 136080, while the sum is 43.

The spelling of 11622637591 in words is "eleven billion, six hundred twenty-two million, six hundred thirty-seven thousand, five hundred ninety-one".