615691390747 has 2 divisors, whose sum is σ = 615691390748. Its totient is φ = 615691390746.

The previous prime is 615691390739. The next prime is 615691390763. The reversal of 615691390747 is 747093196516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 615691390747 - 2³ = 615691390739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 615691390691 and 615691390700.

It is not a weakly prime, because it can be changed into another prime (615691393747) 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, 307845695373 + 307845695374.

It is an arithmetic number, because the mean of its divisors is an integer number (307845695374).

Almost surely, 2^615691390747 is an apocalyptic number.

615691390747 is a deficient number, since it is larger than the sum of its proper divisors (1).

615691390747 is an equidigital number, since it uses as much as digits as its factorization.

615691390747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 615691390747 in words is "six hundred fifteen billion, six hundred ninety-one million, three hundred ninety thousand, seven hundred forty-seven".