11657840919 has 16 divisors (see below), whose sum is σ = 15713679072. Its totient is φ = 7687047168.

The previous prime is 11657840917. The next prime is 11657840947. The reversal of 11657840919 is 91904875611.

It is not a de Polignac number, because 11657840919 - 2¹ = 11657840917 is a prime.

It is a super-2 number, since 2×11657840919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11657840911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498697 + ... + 521549.

It is an arithmetic number, because the mean of its divisors is an integer number (982104942).

Almost surely, 2^11657840919 is an apocalyptic number.

11657840919 is a deficient number, since it is larger than the sum of its proper divisors (4055838153).

11657840919 is a wasteful number, since it uses less digits than its factorization.

11657840919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 11657840919 in words is "eleven billion, six hundred fifty-seven million, eight hundred forty thousand, nine hundred nineteen".