11861950319 has 4 divisors (see below), whose sum is σ = 11862459000. Its totient is φ = 11861441640.

The previous prime is 11861950313. The next prime is 11861950327. The reversal of 11861950319 is 91305916811.

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

It is a cyclic number.

It is not a de Polignac number, because 11861950319 - 2¹² = 11861946223 is a prime.

It is a super-2 number, since 2×11861950319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11861950319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861950313) 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, 217592 + ... + 266589.

It is an arithmetic number, because the mean of its divisors is an integer number (2965614750).

Almost surely, 2^11861950319 is an apocalyptic number.

11861950319 is a deficient number, since it is larger than the sum of its proper divisors (508681).

11861950319 is an equidigital number, since it uses as much as digits as its factorization.

11861950319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508680.

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 11861950319 in words is "eleven billion, eight hundred sixty-one million, nine hundred fifty thousand, three hundred nineteen".