11311640777 has 8 divisors (see below), whose sum is σ = 11702164296. Its totient is φ = 10925580672.

The previous prime is 11311640771. The next prime is 11311640801. The reversal of 11311640777 is 77704611311.

It can be written as a sum of positive squares in 4 ways, for example, as 1376335801 + 9935304976 = 37099^2 + 99676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11311640777 - 2¹⁰ = 11311639753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11311640777.

It is not an unprimeable number, because it can be changed into a prime (11311640771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110698 + ... + 1120835.

It is an arithmetic number, because the mean of its divisors is an integer number (1462770537).

Almost surely, 2^11311640777 is an apocalyptic number.

It is an amenable number.

11311640777 is a deficient number, since it is larger than the sum of its proper divisors (390523519).

11311640777 is a wasteful number, since it uses less digits than its factorization.

11311640777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231707.

The product of its (nonzero) digits is 24696, while the sum is 38.

The spelling of 11311640777 in words is "eleven billion, three hundred eleven million, six hundred forty thousand, seven hundred seventy-seven".