16640402022 has 80 divisors (see below), whose sum is σ = 38642389632. Its totient is φ = 5346570240.

The previous prime is 16640402011. The next prime is 16640402039. The reversal of 16640402022 is 22020404661.

16640402022 is a `hidden beast` number, since 16 + 640 + 4 + 0 + 2 + 0 + 2 + 2 = 666.

It is a super-3 number, since 3×16640402022³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1284208 + ... + 1297100.

Almost surely, 2^16640402022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16640402022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19321194816).

16640402022 is an abundant number, since it is smaller than the sum of its proper divisors (22001987610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16640402022 is a wasteful number, since it uses less digits than its factorization.

16640402022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195 (or 13186 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 16640402022 its reverse (22020404661), we get a palindrome (38660806683).

The spelling of 16640402022 in words is "sixteen billion, six hundred forty million, four hundred two thousand, twenty-two".