863122491220 has 48 divisors (see below), whose sum is σ = 1978038014400. Its totient is φ = 313751160320.

The previous prime is 863122491193. The next prime is 863122491223. The reversal of 863122491220 is 22194221368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863122491223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75685 + ... + 1316044.

It is an arithmetic number, because the mean of its divisors is an integer number (41209125300).

Almost surely, 2^863122491220 is an apocalyptic number.

It is an amenable number.

863122491220 is an abundant number, since it is smaller than the sum of its proper divisors (1114915523180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

863122491220 is a wasteful number, since it uses less digits than its factorization.

863122491220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394568 (or 1394566 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 863122491220 in words is "eight hundred sixty-three billion, one hundred twenty-two million, four hundred ninety-one thousand, two hundred twenty".