398551053481 has 9 divisors (see below), whose sum is σ = 463625753949. Its totient is φ = 341611400844.

The previous prime is 398551053457. The next prime is 398551053497. The reversal of 398551053481 is 184350155893.

It is a happy number.

The square root of 398551053481 is 631309.

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

It is not a de Polignac number, because 398551053481 - 2²⁵ = 398517499049 is a prime.

It is a super-2 number, since 2×398551053481² (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 (398551054481) 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 8 ways as a sum of consecutive naturals, for example, 4374070 + ... + 4464256.

It is an arithmetic number, because the mean of its divisors is an integer number (51513972661).

Almost surely, 2^398551053481 is an apocalyptic number.

398551053481 is the 631309-th square number.

398551053481 is the 315655-th centered octagonal number.

It is an amenable number.

398551053481 is a deficient number, since it is larger than the sum of its proper divisors (65074700468).

398551053481 is an frugal number, since it uses more digits than its factorization.

398551053481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180388 (or 90194 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 398551053481 in words is "three hundred ninety-eight billion, five hundred fifty-one million, fifty-three thousand, four hundred eighty-one".