478121080369 has 3 divisors (see below), whose sum is σ = 478121771833. Its totient is φ = 478120388906.

The previous prime is 478121080343. The next prime is 478121080379. The reversal of 478121080369 is 963080121874.

The square root of 478121080369 is 691463.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-478121080369 is a prime.

It is a super-2 number, since 2×478121080369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478121080379) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 345732 + ... + 1037194.

Almost surely, 2^478121080369 is an apocalyptic number.

478121080369 is the 691463-rd square number.

478121080369 is the 345732-nd centered octagonal number.

It is an amenable number.

478121080369 is a deficient number, since it is larger than the sum of its proper divisors (691464).

478121080369 is an frugal number, since it uses more digits than its factorization.

478121080369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382926 (or 691463 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

Multiplying 478121080369 by its sum of digits (49), we get a square (23427932938081 = 4840241²).

The spelling of 478121080369 in words is "four hundred seventy-eight billion, one hundred twenty-one million, eighty thousand, three hundred sixty-nine".