886779161861557 has 2 divisors, whose sum is σ = 886779161861558. Its totient is φ = 886779161861556.

The previous prime is 886779161861501. The next prime is 886779161861629. The reversal of 886779161861557 is 755168161977688.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649483899780676 + 237295262080881 = 25484974^2 + 15404391^2 .

It is a cyclic number.

It is not a de Polignac number, because 886779161861557 - 2¹⁵ = 886779161828789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (886779161862557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 443389580930778 + 443389580930779.

It is an arithmetic number, because the mean of its divisors is an integer number (443389580930779).

Almost surely, 2^{886779161861557} is an apocalyptic number.

It is an amenable number.

886779161861557 is a deficient number, since it is larger than the sum of its proper divisors (1).

886779161861557 is an equidigital number, since it uses as much as digits as its factorization.

886779161861557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8534937600, while the sum is 85.

The spelling of 886779161861557 in words is "eight hundred eighty-six trillion, seven hundred seventy-nine billion, one hundred sixty-one million, eight hundred sixty-one thousand, five hundred fifty-seven".