6522978581 has 8 divisors (see below), whose sum is σ = 7581186240. Its totient is φ = 5496359328.

The previous prime is 6522978547. The next prime is 6522978587. The reversal of 6522978581 is 1858792256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6522978581 - 2¹⁰ = 6522977557 is a prime.

It is a super-2 number, since 2×6522978581² = 85098499136369547122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6522978587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7896656 + ... + 7897481.

It is an arithmetic number, because the mean of its divisors is an integer number (947648280).

Almost surely, 2^6522978581 is an apocalyptic number.

It is an amenable number.

6522978581 is a deficient number, since it is larger than the sum of its proper divisors (1058207659).

6522978581 is a wasteful number, since it uses less digits than its factorization.

6522978581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15794203.

The product of its digits is 2419200, while the sum is 53.

The square root of 6522978581 is about 80764.9588683112. The cubic root of 6522978581 is about 1868.4521666177.

The spelling of 6522978581 in words is "six billion, five hundred twenty-two million, nine hundred seventy-eight thousand, five hundred eighty-one".