615920457671 has 2 divisors, whose sum is σ = 615920457672. Its totient is φ = 615920457670.

The previous prime is 615920457623. The next prime is 615920457739. The reversal of 615920457671 is 176754029516.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615920457671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (615920457371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307960228835 + 307960228836.

It is an arithmetic number, because the mean of its divisors is an integer number (307960228836).

Almost surely, 2^615920457671 is an apocalyptic number.

615920457671 is a deficient number, since it is larger than the sum of its proper divisors (1).

615920457671 is an equidigital number, since it uses as much as digits as its factorization.

615920457671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 615920457671 in words is "six hundred fifteen billion, nine hundred twenty million, four hundred fifty-seven thousand, six hundred seventy-one".