615330136493 has 2 divisors, whose sum is σ = 615330136494. Its totient is φ = 615330136492.

The previous prime is 615330136453. The next prime is 615330136541. The reversal of 615330136493 is 394631033516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522818655844 + 92511480649 = 723062^2 + 304157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615330136493 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 (615330136403) 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, 307665068246 + 307665068247.

It is an arithmetic number, because the mean of its divisors is an integer number (307665068247).

Almost surely, 2^615330136493 is an apocalyptic number.

It is an amenable number.

615330136493 is a deficient number, since it is larger than the sum of its proper divisors (1).

615330136493 is an equidigital number, since it uses as much as digits as its factorization.

615330136493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 44.

The spelling of 615330136493 in words is "six hundred fifteen billion, three hundred thirty million, one hundred thirty-six thousand, four hundred ninety-three".