8479515159621 has 60 divisors (see below), whose sum is σ = 14584035860064. Its totient is φ = 4868620959600.

The previous prime is 8479515159569. The next prime is 8479515159623. The reversal of 8479515159621 is 1269515159748.

It is a happy number.

8479515159621 is a `hidden beast` number, since 8 + 4 + 7 + 9 + 5 + 1 + 515 + 96 + 21 = 666.

It is not a de Polignac number, because 8479515159621 - 2²⁶ = 8479448050757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8479515159623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 12859585 + ... + 13502886.

Almost surely, 2^{8479515159621} is an apocalyptic number.

8479515159621 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8479515159621 is a deficient number, since it is larger than the sum of its proper divisors (6104520700443).

8479515159621 is a wasteful number, since it uses less digits than its factorization.

8479515159621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26362532 (or 26362504 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 63.

The spelling of 8479515159621 in words is "eight trillion, four hundred seventy-nine billion, five hundred fifteen million, one hundred fifty-nine thousand, six hundred twenty-one".