616581107 has 4 divisors (see below), whose sum is σ = 626689056. Its totient is φ = 606473160.

The previous prime is 616581067. The next prime is 616581113. The reversal of 616581107 is 701185616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616581107 - 2²⁴ = 599803891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616581127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053883 + ... + 5054004.

It is an arithmetic number, because the mean of its divisors is an integer number (156672264).

Almost surely, 2^616581107 is an apocalyptic number.

616581107 is a deficient number, since it is larger than the sum of its proper divisors (10107949).

616581107 is a wasteful number, since it uses less digits than its factorization.

616581107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10107948.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 616581107 is about 24831.0512665090. The cubic root of 616581107 is about 851.1316447383.

The spelling of 616581107 in words is "six hundred sixteen million, five hundred eighty-one thousand, one hundred seven".