11311378465 has 8 divisors (see below), whose sum is σ = 13574963880. Its totient is φ = 9048229632.

The previous prime is 11311378427. The next prime is 11311378489. The reversal of 11311378465 is 56487311311.

It can be written as a sum of positive squares in 4 ways, for example, as 1774684129 + 9536694336 = 42127^2 + 97656^2 .

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 11311378465 - 2²⁹ = 10774507553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49144 + ... + 158233.

It is an arithmetic number, because the mean of its divisors is an integer number (1696870485).

Almost surely, 2^11311378465 is an apocalyptic number.

It is an amenable number.

11311378465 is a deficient number, since it is larger than the sum of its proper divisors (2263585415).

11311378465 is a wasteful number, since it uses less digits than its factorization.

11311378465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218291.

The product of its digits is 60480, while the sum is 40.

Adding to 11311378465 its reverse (56487311311), we get a palindrome (67798689776).

The spelling of 11311378465 in words is "eleven billion, three hundred eleven million, three hundred seventy-eight thousand, four hundred sixty-five".