1615111055617 has 2 divisors, whose sum is σ = 1615111055618. Its totient is φ = 1615111055616.

The previous prime is 1615111055603. The next prime is 1615111055669. The reversal of 1615111055617 is 7165501115161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593247293121 + 21863762496 = 1262239^2 + 147864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1615111055617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1615111055617.

It is not a weakly prime, because it can be changed into another prime (1615111050617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807555527808 + 807555527809.

It is an arithmetic number, because the mean of its divisors is an integer number (807555527809).

Almost surely, 2^{1615111055617} is an apocalyptic number.

It is an amenable number.

1615111055617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1615111055617 is an equidigital number, since it uses as much as digits as its factorization.

1615111055617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 40.

The spelling of 1615111055617 in words is "one trillion, six hundred fifteen billion, one hundred eleven million, fifty-five thousand, six hundred seventeen".