16222731840 has 840 divisors, whose sum is σ = 68679056952. Its totient is φ = 3622993920.

The previous prime is 16222731827. The next prime is 16222731857. The reversal of 16222731840 is 4813722261.

It is a happy number.

16222731840 is a `hidden beast` number, since 1 + 622 + 27 + 3 + 1 + 8 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4698279936 + 11524451904 = 68544^2 + 107352^2 .

It is a tau number, because it is divible by the number of its divisors (840).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16222731795 and 16222731804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 67314120 + ... + 67314360.

Almost surely, 2^16222731840 is an apocalyptic number.

16222731840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16222731840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34339528476).

16222731840 is an abundant number, since it is smaller than the sum of its proper divisors (52456325112).

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

16222731840 is a wasteful number, since it uses less digits than its factorization.

16222731840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 16222731840 in words is "sixteen billion, two hundred twenty-two million, seven hundred thirty-one thousand, eight hundred forty".