16765502640 has 160 divisors (see below), whose sum is σ = 53177596416. Its totient is φ = 4368322560.

The previous prime is 16765502627. The next prime is 16765502671. The reversal of 16765502640 is 4620556761.

16765502640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16765502592 and 16765502601.

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 31 ways as a sum of consecutive naturals, for example, 1921167 + ... + 1929873.

Almost surely, 2^16765502640 is an apocalyptic number.

16765502640 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 16765502640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26588798208).

16765502640 is an abundant number, since it is smaller than the sum of its proper divisors (36412093776).

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

16765502640 is a wasteful number, since it uses less digits than its factorization.

16765502640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8907 (or 8901 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 16765502640 in words is "sixteen billion, seven hundred sixty-five million, five hundred two thousand, six hundred forty".