615691390763 has 2 divisors, whose sum is σ = 615691390764. Its totient is φ = 615691390762.

The previous prime is 615691390747. The next prime is 615691390771. The reversal of 615691390763 is 367093196516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 615691390763 - 2⁴ = 615691390747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 615691390699 and 615691390708.

It is not a weakly prime, because it can be changed into another prime (615691390163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307845695381 + 307845695382.

It is an arithmetic number, because the mean of its divisors is an integer number (307845695382).

Almost surely, 2^615691390763 is an apocalyptic number.

615691390763 is a deficient number, since it is larger than the sum of its proper divisors (1).

615691390763 is an equidigital number, since it uses as much as digits as its factorization.

615691390763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5511240, while the sum is 56.

The spelling of 615691390763 in words is "six hundred fifteen billion, six hundred ninety-one million, three hundred ninety thousand, seven hundred sixty-three".