863604478651 has 2 divisors, whose sum is σ = 863604478652. Its totient is φ = 863604478650.

The previous prime is 863604478613. The next prime is 863604478661. The reversal of 863604478651 is 156874406368.

863604478651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 863604478651 - 2³⁵ = 829244740283 is a prime.

It is not a weakly prime, because it can be changed into another prime (863604478661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431802239325 + 431802239326.

It is an arithmetic number, because the mean of its divisors is an integer number (431802239326).

Almost surely, 2^863604478651 is an apocalyptic number.

863604478651 is a deficient number, since it is larger than the sum of its proper divisors (1).

863604478651 is an equidigital number, since it uses as much as digits as its factorization.

863604478651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 863604478651 in words is "eight hundred sixty-three billion, six hundred four million, four hundred seventy-eight thousand, six hundred fifty-one".