818479457885 has 16 divisors (see below), whose sum is σ = 983760768432. Its totient is φ = 653726976000.

The previous prime is 818479457839. The next prime is 818479457903. The reversal of 818479457885 is 588754974818.

It can be written as a sum of positive squares in 8 ways, for example, as 32556428356 + 785923029529 = 180434^2 + 886523^2 .

It is not a de Polignac number, because 818479457885 - 2¹⁴ = 818479441501 is a prime.

It is a Duffinian number.

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, 21785837 + ... + 21823373.

It is an arithmetic number, because the mean of its divisors is an integer number (61485048027).

Almost surely, 2^818479457885 is an apocalyptic number.

It is an amenable number.

818479457885 is a deficient number, since it is larger than the sum of its proper divisors (165281310547).

818479457885 is a wasteful number, since it uses less digits than its factorization.

818479457885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44464.

The product of its digits is 722534400, while the sum is 74.

The spelling of 818479457885 in words is "eight hundred eighteen billion, four hundred seventy-nine million, four hundred fifty-seven thousand, eight hundred eighty-five".