581686236428 has 36 divisors (see below), whose sum is σ = 1130439914856. Its totient is φ = 261677011200.

The previous prime is 581686236409. The next prime is 581686236431. The reversal of 581686236428 is 824632686185.

581686236428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×581686236428² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6148058 + ... + 6241953.

It is an arithmetic number, because the mean of its divisors is an integer number (31401108746).

Almost surely, 2^581686236428 is an apocalyptic number.

It is an amenable number.

581686236428 is a deficient number, since it is larger than the sum of its proper divisors (548753678428).

581686236428 is a wasteful number, since it uses less digits than its factorization.

581686236428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12390134 (or 12390121 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 59.

The spelling of 581686236428 in words is "five hundred eighty-one billion, six hundred eighty-six million, two hundred thirty-six thousand, four hundred twenty-eight".