11640697777 has 2 divisors, whose sum is σ = 11640697778. Its totient is φ = 11640697776.

The previous prime is 11640697769. The next prime is 11640697801. The reversal of 11640697777 is 77779604611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6492491776 + 5148206001 = 80576^2 + 71751^2 .

It is a cyclic number.

It is not a de Polignac number, because 11640697777 - 2³ = 11640697769 is a prime.

It is not a weakly prime, because it can be changed into another prime (11640697727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5820348888 + 5820348889.

It is an arithmetic number, because the mean of its divisors is an integer number (5820348889).

Almost surely, 2^11640697777 is an apocalyptic number.

It is an amenable number.

11640697777 is a deficient number, since it is larger than the sum of its proper divisors (1).

11640697777 is an equidigital number, since it uses as much as digits as its factorization.

11640697777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 11640697777 in words is "eleven billion, six hundred forty million, six hundred ninety-seven thousand, seven hundred seventy-seven".