16495235640 has 192 divisors, whose sum is σ = 58150965600. Its totient is φ = 4030995456.

The previous prime is 16495235597. The next prime is 16495235663. The reversal of 16495235640 is 4653259461.

16495235640 is a `hidden beast` number, since 1 + 64 + 9 + 5 + 23 + 564 + 0 = 666.

16495235640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 637842 + ... + 663198.

Almost surely, 2^16495235640 is an apocalyptic number.

16495235640 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 16495235640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29075482800).

16495235640 is an abundant number, since it is smaller than the sum of its proper divisors (41655729960).

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

16495235640 is a wasteful number, since it uses less digits than its factorization.

16495235640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25526 (or 25519 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 16495235640 in words is "sixteen billion, four hundred ninety-five million, two hundred thirty-five thousand, six hundred forty".