11961378595 has 16 divisors (see below), whose sum is σ = 14513631840. Its totient is φ = 9462770944.

The previous prime is 11961378589. The next prime is 11961378647. The reversal of 11961378595 is 59587316911.

It is a cyclic number.

It is not a de Polignac number, because 11961378595 - 2⁵ = 11961378563 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284769 + ... + 324061.

It is an arithmetic number, because the mean of its divisors is an integer number (907101990).

Almost surely, 2^11961378595 is an apocalyptic number.

11961378595 is a deficient number, since it is larger than the sum of its proper divisors (2552253245).

11961378595 is a wasteful number, since it uses less digits than its factorization.

11961378595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39974.

The product of its digits is 2041200, while the sum is 55.

The spelling of 11961378595 in words is "eleven billion, nine hundred sixty-one million, three hundred seventy-eight thousand, five hundred ninety-five".