11872006670861 has 2 divisors, whose sum is σ = 11872006670862. Its totient is φ = 11872006670860.

The previous prime is 11872006670801. The next prime is 11872006670959. The reversal of 11872006670861 is 16807660027811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10164580981636 + 1707425689225 = 3188194^2 + 1306685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11872006670861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11872006670801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5936003335430 + 5936003335431.

It is an arithmetic number, because the mean of its divisors is an integer number (5936003335431).

Almost surely, 2^{11872006670861} is an apocalyptic number.

It is an amenable number.

11872006670861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11872006670861 is an equidigital number, since it uses as much as digits as its factorization.

11872006670861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 11872006670861 in words is "eleven trillion, eight hundred seventy-two billion, six million, six hundred seventy thousand, eight hundred sixty-one".