863077659021 has 10 divisors (see below), whose sum is σ = 1289288848782. Its totient is φ = 575385105960.

The previous prime is 863077659013. The next prime is 863077659047. The reversal of 863077659021 is 120956770368.

It can be written as a sum of positive squares in only one way, i.e., 560984522121 + 302093136900 = 748989^2 + 549630^2 .

It is not a de Polignac number, because 863077659021 - 2³ = 863077659013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863077659001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5327639790 + ... + 5327639951.

Almost surely, 2^863077659021 is an apocalyptic number.

863077659021 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

863077659021 is a deficient number, since it is larger than the sum of its proper divisors (426211189761).

863077659021 is a wasteful number, since it uses less digits than its factorization.

863077659021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655279753 (or 10655279744 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 863077659021 in words is "eight hundred sixty-three billion, seventy-seven million, six hundred fifty-nine thousand, twenty-one".