615061613 has 2 divisors, whose sum is σ = 615061614. Its totient is φ = 615061612.

The previous prime is 615061591. The next prime is 615061627. The reversal of 615061613 is 316160516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539075524 + 75986089 = 23218^2 + 8717^2 .

It is a cyclic number.

It is not a de Polignac number, because 615061613 - 2²⁴ = 598284397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615061633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307530806 + 307530807.

It is an arithmetic number, because the mean of its divisors is an integer number (307530807).

Almost surely, 2^615061613 is an apocalyptic number.

It is an amenable number.

615061613 is a deficient number, since it is larger than the sum of its proper divisors (1).

615061613 is an equidigital number, since it uses as much as digits as its factorization.

615061613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 615061613 is about 24800.4357421397. The cubic root of 615061613 is about 850.4318972340.

The spelling of 615061613 in words is "six hundred fifteen million, sixty-one thousand, six hundred thirteen".