11964958861 has 4 divisors (see below), whose sum is σ = 11995717500. Its totient is φ = 11934200224.

The previous prime is 11964958849. The next prime is 11964958877. The reversal of 11964958861 is 16885946911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16885946911 = 1811 ⋅9324101.

It can be written as a sum of positive squares in 2 ways, for example, as 2496501225 + 9468457636 = 49965^2 + 97306^2 .

It is a cyclic number.

It is not a de Polignac number, because 11964958861 - 2⁵ = 11964958829 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11964958796 and 11964958805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11964958801) 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, 15378736 + ... + 15379513.

It is an arithmetic number, because the mean of its divisors is an integer number (2998929375).

Almost surely, 2^11964958861 is an apocalyptic number.

It is an amenable number.

11964958861 is a deficient number, since it is larger than the sum of its proper divisors (30758639).

11964958861 is an equidigital number, since it uses as much as digits as its factorization.

11964958861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30758638.

The product of its digits is 3732480, while the sum is 58.

The spelling of 11964958861 in words is "eleven billion, nine hundred sixty-four million, nine hundred fifty-eight thousand, eight hundred sixty-one".