8155404863 has 4 divisors (see below), whose sum is σ = 8173096008. Its totient is φ = 8137713720.

The previous prime is 8155404857. The next prime is 8155404871. The reversal of 8155404863 is 3684045518.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8155404863 - 2⁶ = 8155404799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8155400863) 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 3 ways as a sum of consecutive naturals, for example, 8844881 + ... + 8845802.

It is an arithmetic number, because the mean of its divisors is an integer number (2043274002).

Almost surely, 2^8155404863 is an apocalyptic number.

8155404863 is a deficient number, since it is larger than the sum of its proper divisors (17691145).

8155404863 is a wasteful number, since it uses less digits than its factorization.

8155404863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17691144.

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 8155404863 is about 90307.2802325483. The cubic root of 8155404863 is about 2012.8674421762.

The spelling of 8155404863 in words is "eight billion, one hundred fifty-five million, four hundred four thousand, eight hundred sixty-three".