615941224817 has 2 divisors, whose sum is σ = 615941224818. Its totient is φ = 615941224816.

The previous prime is 615941224799. The next prime is 615941224859. The reversal of 615941224817 is 718422149516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537429745216 + 78511479601 = 733096^2 + 280199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615941224817 is a prime.

It is a super-2 number, since 2×615941224817² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (615941224867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307970612408 + 307970612409.

It is an arithmetic number, because the mean of its divisors is an integer number (307970612409).

Almost surely, 2^615941224817 is an apocalyptic number.

It is an amenable number.

615941224817 is a deficient number, since it is larger than the sum of its proper divisors (1).

615941224817 is an equidigital number, since it uses as much as digits as its factorization.

615941224817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The spelling of 615941224817 in words is "six hundred fifteen billion, nine hundred forty-one million, two hundred twenty-four thousand, eight hundred seventeen".