11340721887 has 16 divisors (see below), whose sum is σ = 16567639680. Its totient is φ = 6843146400.

The previous prime is 11340721883. The next prime is 11340721897. The reversal of 11340721887 is 78812704311.

It is not a de Polignac number, because 11340721887 - 2² = 11340721883 is a prime.

It is a super-3 number, since 3×11340721887³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11340721883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742789 + ... + 757902.

It is an arithmetic number, because the mean of its divisors is an integer number (1035477480).

Almost surely, 2^11340721887 is an apocalyptic number.

11340721887 is a deficient number, since it is larger than the sum of its proper divisors (5226917793).

11340721887 is a wasteful number, since it uses less digits than its factorization.

11340721887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500934.

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 11340721887 in words is "eleven billion, three hundred forty million, seven hundred twenty-one thousand, eight hundred eighty-seven".