581664230388 has 96 divisors (see below), whose sum is σ = 1618598661120. Its totient is φ = 179983088640.

The previous prime is 581664230387. The next prime is 581664230417. The reversal of 581664230388 is 883032466185.

581664230388 is a `hidden beast` number, since 5 + 81 + 66 + 423 + 0 + 3 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581664230387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2035908 + ... + 2303963.

It is an arithmetic number, because the mean of its divisors is an integer number (16860402720).

Almost surely, 2^581664230388 is an apocalyptic number.

It is an amenable number.

581664230388 is an abundant number, since it is smaller than the sum of its proper divisors (1036934430732).

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

581664230388 is a wasteful number, since it uses less digits than its factorization.

581664230388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339974 (or 4339966 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 581664230388 in words is "five hundred eighty-one billion, six hundred sixty-four million, two hundred thirty thousand, three hundred eighty-eight".