928087581857 has 2 divisors, whose sum is σ = 928087581858. Its totient is φ = 928087581856.

The previous prime is 928087581853. The next prime is 928087581917. The reversal of 928087581857 is 758185780829.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628474759696 + 299612822161 = 792764^2 + 547369^2 .

It is a cyclic number.

It is not a de Polignac number, because 928087581857 - 2² = 928087581853 is a prime.

It is a super-2 number, since 2×928087581857² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (928087581851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464043790928 + 464043790929.

It is an arithmetic number, because the mean of its divisors is an integer number (464043790929).

Almost surely, 2^928087581857 is an apocalyptic number.

It is an amenable number.

928087581857 is a deficient number, since it is larger than the sum of its proper divisors (1).

928087581857 is an equidigital number, since it uses as much as digits as its factorization.

928087581857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90316800, while the sum is 68.

The spelling of 928087581857 in words is "nine hundred twenty-eight billion, eighty-seven million, five hundred eighty-one thousand, eight hundred fifty-seven".