863145956881 has 8 divisors (see below), whose sum is σ = 929562346944. Its totient is φ = 796732502160.

The previous prime is 863145956867. The next prime is 863145956903. The reversal of 863145956881 is 188659541368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 863145956881 - 2³¹ = 860998473233 is a prime.

It is a super-2 number, since 2×863145956881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863145956821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103015 + ... + 1317916.

It is an arithmetic number, because the mean of its divisors is an integer number (116195293368).

Almost surely, 2^863145956881 is an apocalyptic number.

It is an amenable number.

863145956881 is a deficient number, since it is larger than the sum of its proper divisors (66416390063).

863145956881 is a wasteful number, since it uses less digits than its factorization.

863145956881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467671.

The product of its digits is 49766400, while the sum is 64.

The spelling of 863145956881 in words is "eight hundred sixty-three billion, one hundred forty-five million, nine hundred fifty-six thousand, eight hundred eighty-one".