1864648464677 has 2 divisors, whose sum is σ = 1864648464678. Its totient is φ = 1864648464676.

The previous prime is 1864648464667. The next prime is 1864648464697. The reversal of 1864648464677 is 7764648464681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1622632678276 + 242015786401 = 1273826^2 + 491951^2 .

It is an emirp because it is prime and its reverse (7764648464681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1864648464677 - 2³⁴ = 1847468595493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1864648464677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1864648464667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932324232338 + 932324232339.

It is an arithmetic number, because the mean of its divisors is an integer number (932324232339).

Almost surely, 2^{1864648464677} is an apocalyptic number.

It is an amenable number.

1864648464677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864648464677 is an equidigital number, since it uses as much as digits as its factorization.

1864648464677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1040449536, while the sum is 71.

The spelling of 1864648464677 in words is "one trillion, eight hundred sixty-four billion, six hundred forty-eight million, four hundred sixty-four thousand, six hundred seventy-seven".