616610605 has 8 divisors (see below), whose sum is σ = 796850712. Its totient is φ = 455343168.

The previous prime is 616610597. The next prime is 616610627. The reversal of 616610605 is 506016616.

It can be written as a sum of positive squares in 4 ways, for example, as 32228329 + 584382276 = 5677^2 + 24174^2 .

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 616610605 - 2³ = 616610597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4743094 + ... + 4743223.

It is an arithmetic number, because the mean of its divisors is an integer number (99606339).

Almost surely, 2^616610605 is an apocalyptic number.

616610605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

616610605 is a deficient number, since it is larger than the sum of its proper divisors (180240107).

616610605 is a wasteful number, since it uses less digits than its factorization.

616610605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9486335.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 616610605 is about 24831.6452334516. The cubic root of 616610605 is about 851.1452175841.

The spelling of 616610605 in words is "six hundred sixteen million, six hundred ten thousand, six hundred five".