863051055440 has 80 divisors (see below), whose sum is σ = 2413947342720. Its totient is φ = 280329361920.

The previous prime is 863051055401. The next prime is 863051055457. The reversal of 863051055440 is 44550150368.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40546271 + ... + 40567550.

It is an arithmetic number, because the mean of its divisors is an integer number (30174341784).

Almost surely, 2^863051055440 is an apocalyptic number.

863051055440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863051055440 is an abundant number, since it is smaller than the sum of its proper divisors (1550896287280).

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

863051055440 is a wasteful number, since it uses less digits than its factorization.

863051055440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81113860 (or 81113854 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 863051055440 in words is "eight hundred sixty-three billion, fifty-one million, fifty-five thousand, four hundred forty".