612438873647 has 2 divisors, whose sum is σ = 612438873648. Its totient is φ = 612438873646.

The previous prime is 612438873643. The next prime is 612438873661. The reversal of 612438873647 is 746378834216.

612438873647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 612438873647 - 2² = 612438873643 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612438873643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306219436823 + 306219436824.

It is an arithmetic number, because the mean of its divisors is an integer number (306219436824).

Almost surely, 2^612438873647 is an apocalyptic number.

612438873647 is a deficient number, since it is larger than the sum of its proper divisors (1).

612438873647 is an equidigital number, since it uses as much as digits as its factorization.

612438873647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32514048, while the sum is 59.

The spelling of 612438873647 in words is "six hundred twelve billion, four hundred thirty-eight million, eight hundred seventy-three thousand, six hundred forty-seven".