8216479813644 has 48 divisors (see below), whose sum is σ = 21989145507840. Its totient is φ = 2650477358160.

The previous prime is 8216479813631. The next prime is 8216479813649. The reversal of 8216479813644 is 4463189746128.

8216479813644 is a `hidden beast` number, since 8 + 2 + 16 + 479 + 81 + 36 + 44 = 666.

It is not an unprimeable number, because it can be changed into a prime (8216479813649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1227069504 + ... + 1227076199.

It is an arithmetic number, because the mean of its divisors is an integer number (458107198080).

Almost surely, 2^{8216479813644} is an apocalyptic number.

It is an amenable number.

8216479813644 is an abundant number, since it is smaller than the sum of its proper divisors (13772665694196).

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

8216479813644 is a wasteful number, since it uses less digits than its factorization.

8216479813644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454145747 (or 2454145739 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 8216479813644 in words is "eight trillion, two hundred sixteen billion, four hundred seventy-nine million, eight hundred thirteen thousand, six hundred forty-four".