7581025820 has 48 divisors (see below), whose sum is σ = 16469526528. Its totient is φ = 2928194880.

The previous prime is 7581025811. The next prime is 7581025841. The reversal of 7581025820 is 285201857.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276449 + ... + 302631.

It is an arithmetic number, because the mean of its divisors is an integer number (343115136).

Almost surely, 2^7581025820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7581025820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8234763264).

7581025820 is an abundant number, since it is smaller than the sum of its proper divisors (8888500708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7581025820 is a wasteful number, since it uses less digits than its factorization.

7581025820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26690 (or 26688 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 7581025820 is about 87069.0864773485. The cubic root of 7581025820 is about 1964.4575953516.

The spelling of 7581025820 in words is "seven billion, five hundred eighty-one million, twenty-five thousand, eight hundred twenty".