1616694517 has 2 divisors, whose sum is σ = 1616694518. Its totient is φ = 1616694516.

The previous prime is 1616694511. The next prime is 1616694533. The reversal of 1616694517 is 7154966161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1067917041 + 548777476 = 32679^2 + 23426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616694517 is a prime.

It is a super-2 number, since 2×1616694517² = 5227402322595726578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1616694511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808347258 + 808347259.

It is an arithmetic number, because the mean of its divisors is an integer number (808347259).

Almost surely, 2^1616694517 is an apocalyptic number.

It is an amenable number.

1616694517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616694517 is an equidigital number, since it uses as much as digits as its factorization.

1616694517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 1616694517 is about 40208.1399345953. The cubic root of 1616694517 is about 1173.6609503875.

The spelling of 1616694517 in words is "one billion, six hundred sixteen million, six hundred ninety-four thousand, five hundred seventeen".