616807641 has 8 divisors (see below), whose sum is σ = 850769280. Its totient is φ = 397025552.

The previous prime is 616807613. The next prime is 616807643. The reversal of 616807641 is 146708616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616807641 - 2¹¹ = 616805593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 616807641.

It is not an unprimeable number, because it can be changed into a prime (616807643) 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, 3544785 + ... + 3544958.

It is an arithmetic number, because the mean of its divisors is an integer number (106346160).

Almost surely, 2^616807641 is an apocalyptic number.

It is an amenable number.

616807641 is a deficient number, since it is larger than the sum of its proper divisors (233961639).

616807641 is a wasteful number, since it uses less digits than its factorization.

616807641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089775.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 616807641 is about 24835.6123540371. The cubic root of 616807641 is about 851.2358681976.

The spelling of 616807641 in words is "six hundred sixteen million, eight hundred seven thousand, six hundred forty-one".