5781929521 has 3 divisors (see below), whose sum is σ = 5782005561. Its totient is φ = 5781853482.

The previous prime is 5781929513. The next prime is 5781929533. The reversal of 5781929521 is 1259291875.

The square root of 5781929521 is 76039.

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 5781929521 - 2³ = 5781929513 is a prime.

It is a super-2 number, since 2×5781929521² = 66861417971622578882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5781929561) 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, 38020 + ... + 114058.

It is an arithmetic number, because the mean of its divisors is an integer number (1927335187).

Almost surely, 2^5781929521 is an apocalyptic number.

5781929521 is the 76039-th square number.

5781929521 is the 38020-th centered octagonal number.

It is an amenable number.

5781929521 is a deficient number, since it is larger than the sum of its proper divisors (76040).

5781929521 is an frugal number, since it uses more digits than its factorization.

5781929521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152078 (or 76039 counting only the distinct ones).

The product of its digits is 453600, while the sum is 49.

The cubic root of 5781929521 is about 1794.8339033623.

Multiplying 5781929521 by its sum of digits (49), we get a square (283314546529 = 532273²).

The spelling of 5781929521 in words is "five billion, seven hundred eighty-one million, nine hundred twenty-nine thousand, five hundred twenty-one".