870640867631783 has 2 divisors, whose sum is σ = 870640867631784. Its totient is φ = 870640867631782.

The previous prime is 870640867631719. The next prime is 870640867631897. The reversal of 870640867631783 is 387136768046078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 870640867631783 - 2⁶ = 870640867631719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 870640867631783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870640863631783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435320433815891 + 435320433815892.

It is an arithmetic number, because the mean of its divisors is an integer number (435320433815892).

Almost surely, 2^{870640867631783} is an apocalyptic number.

870640867631783 is a deficient number, since it is larger than the sum of its proper divisors (1).

870640867631783 is an equidigital number, since it uses as much as digits as its factorization.

870640867631783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1365590016, while the sum is 74.

The spelling of 870640867631783 in words is "eight hundred seventy trillion, six hundred forty billion, eight hundred sixty-seven million, six hundred thirty-one thousand, seven hundred eighty-three".