11860905321 has 12 divisors (see below), whose sum is σ = 18140208372. Its totient is φ = 7442136576.

The previous prime is 11860905263. The next prime is 11860905347. The reversal of 11860905321 is 12350906811.

11860905321 is a `hidden beast` number, since 1 + 18 + 609 + 0 + 5 + 32 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10949529600 + 911375721 = 104640^2 + 30189^2 .

It is not a de Polignac number, because 11860905321 - 2⁷ = 11860905193 is a prime.

It is a super-2 number, since 2×11860905321² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11860905391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38760976 + ... + 38761281.

It is an arithmetic number, because the mean of its divisors is an integer number (1511684031).

Almost surely, 2^11860905321 is an apocalyptic number.

It is an amenable number.

11860905321 is a deficient number, since it is larger than the sum of its proper divisors (6279303051).

11860905321 is a wasteful number, since it uses less digits than its factorization.

11860905321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77522280 (or 77522277 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 11860905321 in words is "eleven billion, eight hundred sixty million, nine hundred five thousand, three hundred twenty-one".