11865692129 has 2 divisors, whose sum is σ = 11865692130. Its totient is φ = 11865692128.

The previous prime is 11865692119. The next prime is 11865692221. The reversal of 11865692129 is 92129656811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9317461729 + 2548230400 = 96527^2 + 50480^2 .

It is an emirp because it is prime and its reverse (92129656811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11865692129 - 2¹⁶ = 11865626593 is a prime.

It is not a weakly prime, because it can be changed into another prime (11865692119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932846064 + 5932846065.

It is an arithmetic number, because the mean of its divisors is an integer number (5932846065).

Almost surely, 2^11865692129 is an apocalyptic number.

It is an amenable number.

11865692129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865692129 is an equidigital number, since it uses as much as digits as its factorization.

11865692129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The spelling of 11865692129 in words is "eleven billion, eight hundred sixty-five million, six hundred ninety-two thousand, one hundred twenty-nine".