6615385461493 has 2 divisors, whose sum is σ = 6615385461494. Its totient is φ = 6615385461492.

The previous prime is 6615385461469. The next prime is 6615385461569. The reversal of 6615385461493 is 3941645835166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4069168459524 + 2546217001969 = 2017218^2 + 1595687^2 .

It is a cyclic number.

It is not a de Polignac number, because 6615385461493 - 2²⁵ = 6615351907061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6615385461463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307692730746 + 3307692730747.

It is an arithmetic number, because the mean of its divisors is an integer number (3307692730747).

Almost surely, 2^{6615385461493} is an apocalyptic number.

It is an amenable number.

6615385461493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615385461493 is an equidigital number, since it uses as much as digits as its factorization.

6615385461493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55987200, while the sum is 61.

The spelling of 6615385461493 in words is "six trillion, six hundred fifteen billion, three hundred eighty-five million, four hundred sixty-one thousand, four hundred ninety-three".