16610365440 has 1040 divisors, whose sum is σ = 68505592320. Its totient is φ = 3822059520.

The previous prime is 16610365417. The next prime is 16610365451. The reversal of 16610365440 is 4456301661.

It is a happy number.

16610365440 is a `hidden beast` number, since 1 + 6 + 6 + 103 + 6 + 544 + 0 = 666.

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 = 16610365395 and 16610365404.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 535818225 + ... + 535818255.

Almost surely, 2^16610365440 is an apocalyptic number.

16610365440 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 16610365440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34252796160).

16610365440 is an abundant number, since it is smaller than the sum of its proper divisors (51895226880).

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

16610365440 is a wasteful number, since it uses less digits than its factorization.

16610365440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 16610365440 in words is "sixteen billion, six hundred ten million, three hundred sixty-five thousand, four hundred forty".