615149794789 has 2 divisors, whose sum is σ = 615149794790. Its totient is φ = 615149794788.

The previous prime is 615149794751. The next prime is 615149794811. The reversal of 615149794789 is 987497941516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467726049025 + 147423745764 = 683905^2 + 383958^2 .

It is a cyclic number.

It is not a de Polignac number, because 615149794789 - 2⁷ = 615149794661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615149794729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307574897394 + 307574897395.

It is an arithmetic number, because the mean of its divisors is an integer number (307574897395).

Almost surely, 2^615149794789 is an apocalyptic number.

It is an amenable number.

615149794789 is a deficient number, since it is larger than the sum of its proper divisors (1).

615149794789 is an equidigital number, since it uses as much as digits as its factorization.

615149794789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 70.

The spelling of 615149794789 in words is "six hundred fifteen billion, one hundred forty-nine million, seven hundred ninety-four thousand, seven hundred eighty-nine".