616510117 has 6 divisors (see below), whose sum is σ = 654908978. Its totient is φ = 580244544.

The previous prime is 616510109. The next prime is 616510127. The reversal of 616510117 is 711015616.

It can be written as a sum of positive squares in 3 ways, for example, as 442639521 + 173870596 = 21039^2 + 13186^2 .

It is not a de Polignac number, because 616510117 - 2³ = 616510109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616510127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1066338 + ... + 1066915.

Almost surely, 2^616510117 is an apocalyptic number.

It is an amenable number.

616510117 is a deficient number, since it is larger than the sum of its proper divisors (38398861).

616510117 is a wasteful number, since it uses less digits than its factorization.

616510117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133287 (or 2133270 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 616510117 is about 24829.6217651417. The cubic root of 616510117 is about 851.0989785009.

The spelling of 616510117 in words is "six hundred sixteen million, five hundred ten thousand, one hundred seventeen".