878045550973 has 2 divisors, whose sum is σ = 878045550974. Its totient is φ = 878045550972.

The previous prime is 878045550931. The next prime is 878045551057. The reversal of 878045550973 is 379055540878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672181897689 + 205863653284 = 819867^2 + 453722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878045550973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878045550373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439022775486 + 439022775487.

It is an arithmetic number, because the mean of its divisors is an integer number (439022775487).

Almost surely, 2^878045550973 is an apocalyptic number.

It is an amenable number.

878045550973 is a deficient number, since it is larger than the sum of its proper divisors (1).

878045550973 is an equidigital number, since it uses as much as digits as its factorization.

878045550973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336000, while the sum is 61.

The spelling of 878045550973 in words is "eight hundred seventy-eight billion, forty-five million, five hundred fifty thousand, nine hundred seventy-three".