415752854521 has 3 divisors (see below), whose sum is σ = 415753499311. Its totient is φ = 415752209732.

The previous prime is 415752854507. The next prime is 415752854581. The reversal of 415752854521 is 125458257514.

The square root of 415752854521 is 644789.

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 can be written as a sum of positive squares in only one way, i.e., 254357826921 + 161395027600 = 504339^2 + 401740^2 .

It is not a de Polignac number, because 415752854521 - 2⁷ = 415752854393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (415752854501) 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, 322395 + ... + 967183.

Almost surely, 2^415752854521 is an apocalyptic number.

415752854521 is the 644789-th square number.

415752854521 is the 322395-th centered octagonal number.

It is an amenable number.

415752854521 is a deficient number, since it is larger than the sum of its proper divisors (644790).

415752854521 is an frugal number, since it uses more digits than its factorization.

415752854521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289578 (or 644789 counting only the distinct ones).

The product of its digits is 2240000, while the sum is 49.

Multiplying 415752854521 by its sum of digits (49), we get a square (20371889871529 = 4513523²).

The spelling of 415752854521 in words is "four hundred fifteen billion, seven hundred fifty-two million, eight hundred fifty-four thousand, five hundred twenty-one".