863155463091 has 16 divisors (see below), whose sum is σ = 1179189225984. Its totient is φ = 561359100384.

The previous prime is 863155463077. The next prime is 863155463143. The reversal of 863155463091 is 190364551368.

It is not a de Polignac number, because 863155463091 - 2⁷ = 863155462963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863155463041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9926860 + ... + 10013433.

It is an arithmetic number, because the mean of its divisors is an integer number (73699326624).

Almost surely, 2^863155463091 is an apocalyptic number.

863155463091 is a deficient number, since it is larger than the sum of its proper divisors (316033762893).

863155463091 is a wasteful number, since it uses less digits than its factorization.

863155463091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19940650.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 863155463091 in words is "eight hundred sixty-three billion, one hundred fifty-five million, four hundred sixty-three thousand, ninety-one".