878045551057 has 2 divisors, whose sum is σ = 878045551058. Its totient is φ = 878045551056.

The previous prime is 878045550973. The next prime is 878045551069. The reversal of 878045551057 is 750155540878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505804017601 + 372241533456 = 711199^2 + 610116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878045551057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 878045550989 and 878045551007.

It is not a weakly prime, because it can be changed into another prime (878045551087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439022775528 + 439022775529.

It is an arithmetic number, because the mean of its divisors is an integer number (439022775529).

Almost surely, 2^878045551057 is an apocalyptic number.

It is an amenable number.

878045551057 is a deficient number, since it is larger than the sum of its proper divisors (1).

878045551057 is an equidigital number, since it uses as much as digits as its factorization.

878045551057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840000, while the sum is 55.

The spelling of 878045551057 in words is "eight hundred seventy-eight billion, forty-five million, five hundred fifty-one thousand, fifty-seven".