11540964391 has 12 divisors (see below), whose sum is σ = 12694185000. Its totient is φ = 10484621840.

The previous prime is 11540964377. The next prime is 11540964433. The reversal of 11540964391 is 19346904511.

It is not a de Polignac number, because 11540964391 - 2⁷ = 11540964263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540964361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149565 + ... + 213193.

It is an arithmetic number, because the mean of its divisors is an integer number (1057848750).

Almost surely, 2^11540964391 is an apocalyptic number.

11540964391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11540964391 is a deficient number, since it is larger than the sum of its proper divisors (1153220609).

11540964391 is a wasteful number, since it uses less digits than its factorization.

11540964391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65150 (or 65139 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 11540964391 in words is "eleven billion, five hundred forty million, nine hundred sixty-four thousand, three hundred ninety-one".