863820380636 has 24 divisors (see below), whose sum is σ = 1527664289760. Its totient is φ = 427350536000.

The previous prime is 863820380587. The next prime is 863820380681. The reversal of 863820380636 is 636083028368.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97091 + ... + 1317978.

It is an arithmetic number, because the mean of its divisors is an integer number (63652678740).

Almost surely, 2^863820380636 is an apocalyptic number.

It is an amenable number.

863820380636 is a deficient number, since it is larger than the sum of its proper divisors (663843909124).

863820380636 is a wasteful number, since it uses less digits than its factorization.

863820380636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416685 (or 1416683 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 863820380636 in words is "eight hundred sixty-three billion, eight hundred twenty million, three hundred eighty thousand, six hundred thirty-six".