581855278948 has 6 divisors (see below), whose sum is σ = 1018246738166. Its totient is φ = 290927639472.

The previous prime is 581855278943. The next prime is 581855278957. The reversal of 581855278948 is 849872558185.

It can be written as a sum of positive squares in only one way, i.e., 414179770624 + 167675508324 = 643568^2 + 409482^2 .

It is a super-4 number, since 4×581855278948⁴ (a number of 48 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (581855278943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72731909865 + ... + 72731909872.

Almost surely, 2^581855278948 is an apocalyptic number.

It is an amenable number.

581855278948 is a deficient number, since it is larger than the sum of its proper divisors (436391459218).

581855278948 is a wasteful number, since it uses less digits than its factorization.

581855278948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145463819741 (or 145463819739 counting only the distinct ones).

The product of its digits is 258048000, while the sum is 70.

The spelling of 581855278948 in words is "five hundred eighty-one billion, eight hundred fifty-five million, two hundred seventy-eight thousand, nine hundred forty-eight".