878555659973 has 2 divisors, whose sum is σ = 878555659974. Its totient is φ = 878555659972.

The previous prime is 878555659967. The next prime is 878555659981. The reversal of 878555659973 is 379956555878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878555659969 + 4 = 937313^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 878555659973 - 2⁴ = 878555659957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 878555659894 and 878555659903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878555659913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439277829986 + 439277829987.

It is an arithmetic number, because the mean of its divisors is an integer number (439277829987).

Almost surely, 2^878555659973 is an apocalyptic number.

It is an amenable number.

878555659973 is a deficient number, since it is larger than the sum of its proper divisors (1).

878555659973 is an equidigital number, since it uses as much as digits as its factorization.

878555659973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680000, while the sum is 77.

The spelling of 878555659973 in words is "eight hundred seventy-eight billion, five hundred fifty-five million, six hundred fifty-nine thousand, nine hundred seventy-three".