11311140644 has 24 divisors (see below), whose sum is σ = 20254623480. Its totient is φ = 5525022464.

The previous prime is 11311140619. The next prime is 11311140647. The reversal of 11311140644 is 44604111311.

It can be written as a sum of positive squares in 4 ways, for example, as 3811580644 + 7499560000 = 61738^2 + 86600^2 .

It is not an unprimeable number, because it can be changed into a prime (11311140647) 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, 65099 + ... + 163890.

It is an arithmetic number, because the mean of its divisors is an integer number (843942645).

Almost surely, 2^11311140644 is an apocalyptic number.

It is an amenable number.

11311140644 is a deficient number, since it is larger than the sum of its proper divisors (8943482836).

11311140644 is a wasteful number, since it uses less digits than its factorization.

11311140644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229279 (or 229277 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 11311140644 its reverse (44604111311), we get a palindrome (55915251955).

The spelling of 11311140644 in words is "eleven billion, three hundred eleven million, one hundred forty thousand, six hundred forty-four".