11620345601 has 4 divisors (see below), whose sum is σ = 11629895172. Its totient is φ = 11610796032.

The previous prime is 11620345577. The next prime is 11620345613. The reversal of 11620345601 is 10654302611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2362057201 + 9258288400 = 48601^2 + 96220^2 .

It is a cyclic number.

It is not a de Polignac number, because 11620345601 - 2²² = 11616151297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11620345901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4772960 + ... + 4775393.

It is an arithmetic number, because the mean of its divisors is an integer number (2907473793).

Almost surely, 2^11620345601 is an apocalyptic number.

It is an amenable number.

11620345601 is a deficient number, since it is larger than the sum of its proper divisors (9549571).

11620345601 is an equidigital number, since it uses as much as digits as its factorization.

11620345601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549570.

The product of its (nonzero) digits is 4320, while the sum is 29.

Subtracting from 11620345601 its reverse (10654302611), we obtain a triangular number (966042990 = T₄₃₉₅₅).

The spelling of 11620345601 in words is "eleven billion, six hundred twenty million, three hundred forty-five thousand, six hundred one".