479515352869921 has 9 divisors (see below), whose sum is σ = 479786667186099. Its totient is φ = 479244191929584.

The previous prime is 479515352869913. The next prime is 479515352869937. The reversal of 479515352869921 is 129968253515974.

The square root of 479515352869921 is 21897839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21737833888225 + 457777518981696 = 4662385^2 + 21395736^2 .

It is not a de Polignac number, because 479515352869921 - 2³ = 479515352869913 is a prime.

It is a super-2 number, since 2×479515352869921² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479515352869951) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 46795676820 + ... + 46795687066.

Almost surely, 2^{479515352869921} is an apocalyptic number.

479515352869921 is the 21897839-th square number.

479515352869921 is the 10948920-th centered octagonal number.

It is an amenable number.

479515352869921 is a deficient number, since it is larger than the sum of its proper divisors (271314316178).

479515352869921 is an frugal number, since it uses more digits than its factorization.

479515352869921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24768 (or 12384 counting only the distinct ones).

The product of its digits is 1469664000, while the sum is 76.

The spelling of 479515352869921 in words is "four hundred seventy-nine trillion, five hundred fifteen billion, three hundred fifty-two million, eight hundred sixty-nine thousand, nine hundred twenty-one".