16278902640 has 640 divisors, whose sum is σ = 75295180800. Its totient is φ = 3122012160.

The previous prime is 16278902623. The next prime is 16278902641. The reversal of 16278902640 is 4620987261.

It is a happy number.

16278902640 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 not an unprimeable number, because it can be changed into a prime (16278902641) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 2158396 + ... + 2165924.

It is an arithmetic number, because the mean of its divisors is an integer number (117648720).

Almost surely, 2^16278902640 is an apocalyptic number.

16278902640 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 16278902640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37647590400).

16278902640 is an abundant number, since it is smaller than the sum of its proper divisors (59016278160).

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

16278902640 is a wasteful number, since it uses less digits than its factorization.

16278902640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582 (or 7570 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 16278902640 in words is "sixteen billion, two hundred seventy-eight million, nine hundred two thousand, six hundred forty".