840988213911 has 6 divisors (see below), whose sum is σ = 1214760753440. Its totient is φ = 560658809268.

The previous prime is 840988213859. The next prime is 840988213913. The reversal of 840988213911 is 119312889048.

It is a happy number.

840988213911 is a `hidden beast` number, since 8 + 409 + 8 + 8 + 213 + 9 + 11 = 666.

It is not a de Polignac number, because 840988213911 - 2⁶ = 840988213847 is a prime.

It is a super-2 number, since 2×840988213911² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840988213913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46721567431 + ... + 46721567448.

Almost surely, 2^840988213911 is an apocalyptic number.

840988213911 is a deficient number, since it is larger than the sum of its proper divisors (373772539529).

840988213911 is a wasteful number, since it uses less digits than its factorization.

840988213911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93443134885 (or 93443134882 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 840988213911 in words is "eight hundred forty billion, nine hundred eighty-eight million, two hundred thirteen thousand, nine hundred eleven".