618820557444787 has 2 divisors, whose sum is σ = 618820557444788. Its totient is φ = 618820557444786.

The previous prime is 618820557444763. The next prime is 618820557444829. The reversal of 618820557444787 is 787444755028816.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618820557444787 - 2¹⁹ = 618820556920499 is a prime.

It is not a weakly prime, because it can be changed into another prime (618820557444707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309410278722393 + 309410278722394.

It is an arithmetic number, because the mean of its divisors is an integer number (309410278722394).

Almost surely, 2^{618820557444787} is an apocalyptic number.

618820557444787 is a deficient number, since it is larger than the sum of its proper divisors (1).

618820557444787 is an equidigital number, since it uses as much as digits as its factorization.

618820557444787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3371827200, while the sum is 76.

The spelling of 618820557444787 in words is "six hundred eighteen trillion, eight hundred twenty billion, five hundred fifty-seven million, four hundred forty-four thousand, seven hundred eighty-seven".