616288640 has 64 divisors (see below), whose sum is σ = 1607271120. Its totient is φ = 224102400.

The previous prime is 616288639. The next prime is 616288643. The reversal of 616288640 is 46882616.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616288643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36731 + ... + 50810.

Almost surely, 2^616288640 is an apocalyptic number.

It is an amenable number.

616288640 is an abundant number, since it is smaller than the sum of its proper divisors (990982480).

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

616288640 is a wasteful number, since it uses less digits than its factorization.

616288640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87571 (or 87559 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 616288640 is about 24825.1614294852. The cubic root of 616288640 is about 850.9970491515.

The spelling of 616288640 in words is "six hundred sixteen million, two hundred eighty-eight thousand, six hundred forty".