11888640061 has 2 divisors, whose sum is σ = 11888640062. Its totient is φ = 11888640060.

The previous prime is 11888640047. The next prime is 11888640077. The reversal of 11888640061 is 16004688811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11888631225 + 8836 = 109035^2 + 94^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11888640061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11888640011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5944320030 + 5944320031.

It is an arithmetic number, because the mean of its divisors is an integer number (5944320031).

Almost surely, 2^11888640061 is an apocalyptic number.

It is an amenable number.

11888640061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11888640061 is an equidigital number, since it uses as much as digits as its factorization.

11888640061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 43.

The spelling of 11888640061 in words is "eleven billion, eight hundred eighty-eight million, six hundred forty thousand, sixty-one".