481690133521 has 3 divisors (see below), whose sum is σ = 481690827561. Its totient is φ = 481689439482.

The previous prime is 481690133473. The next prime is 481690133539. The reversal of 481690133521 is 125331096184.

The square root of 481690133521 is 694039.

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 not a de Polignac number, because 481690133521 - 2²⁷ = 481555915793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481690133621) 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, 347020 + ... + 1041058.

It is an arithmetic number, because the mean of its divisors is an integer number (160563609187).

Almost surely, 2^481690133521 is an apocalyptic number.

481690133521 is the 694039-th square number.

481690133521 is the 347020-th centered octagonal number.

It is an amenable number.

481690133521 is a deficient number, since it is larger than the sum of its proper divisors (694040).

481690133521 is an frugal number, since it uses more digits than its factorization.

481690133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388078 (or 694039 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 481690133521 in words is "four hundred eighty-one billion, six hundred ninety million, one hundred thirty-three thousand, five hundred twenty-one".