616471640 has 32 divisors (see below), whose sum is σ = 1390662000. Its totient is φ = 245948544.

The previous prime is 616471637. The next prime is 616471643. The reversal of 616471640 is 46174616.

616471640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (616471637) and next prime (616471643).

It is a self number, because there is not a number n which added to its sum of digits gives 616471640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616471643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4250 + ... + 35369.

Almost surely, 2^616471640 is an apocalyptic number.

It is an amenable number.

616471640 is an abundant number, since it is smaller than the sum of its proper divisors (774190360).

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

616471640 is a wasteful number, since it uses less digits than its factorization.

616471640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40019 (or 40015 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 616471640 is about 24828.8469325500. The cubic root of 616471640 is about 851.0812721590.

The spelling of 616471640 in words is "six hundred sixteen million, four hundred seventy-one thousand, six hundred forty".