11650620613 has 4 divisors (see below), whose sum is σ = 11651232268. Its totient is φ = 11650008960.

The previous prime is 11650620607. The next prime is 11650620617. The reversal of 11650620613 is 31602605611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31602605611 = 181 ⋅174600031.

It can be written as a sum of positive squares in 2 ways, for example, as 10815584004 + 835036609 = 103998^2 + 28897^2 .

It is a cyclic number.

It is not a de Polignac number, because 11650620613 - 2¹⁷ = 11650489541 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 (11650620617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276306 + ... + 315667.

It is an arithmetic number, because the mean of its divisors is an integer number (2912808067).

Almost surely, 2^11650620613 is an apocalyptic number.

It is an amenable number.

11650620613 is a deficient number, since it is larger than the sum of its proper divisors (611655).

11650620613 is an equidigital number, since it uses as much as digits as its factorization.

11650620613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611654.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 11650620613 in words is "eleven billion, six hundred fifty million, six hundred twenty thousand, six hundred thirteen".