616525617 has 4 divisors (see below), whose sum is σ = 822034160. Its totient is φ = 411017076.

The previous prime is 616525573. The next prime is 616525631. The reversal of 616525617 is 716525616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 616525617 - 2²⁰ = 615477041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616525667) 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, 102754267 + ... + 102754272.

It is an arithmetic number, because the mean of its divisors is an integer number (205508540).

Almost surely, 2^616525617 is an apocalyptic number.

It is an amenable number.

616525617 is a deficient number, since it is larger than the sum of its proper divisors (205508543).

616525617 is a wasteful number, since it uses less digits than its factorization.

616525617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205508542.

The product of its digits is 75600, while the sum is 39.

The square root of 616525617 is about 24829.9338903671. The cubic root of 616525617 is about 851.1061110811.

Subtracting 616525617 from its reverse (716525616), we obtain a palindrome (99999999).

The spelling of 616525617 in words is "six hundred sixteen million, five hundred twenty-five thousand, six hundred seventeen".