581240064 has 72 divisors (see below), whose sum is σ = 1637979840. Its totient is φ = 182345728.

The previous prime is 581240053. The next prime is 581240087. The reversal of 581240064 is 460042185.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9204 + ... + 35315.

It is an arithmetic number, because the mean of its divisors is an integer number (22749720).

Almost surely, 2^581240064 is an apocalyptic number.

It is an amenable number.

581240064 is an abundant number, since it is smaller than the sum of its proper divisors (1056739776).

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

581240064 is a wasteful number, since it uses less digits than its factorization.

581240064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44555 (or 44541 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 581240064 is about 24108.9208385610. The cubic root of 581240064 is about 834.5490119637.

The spelling of 581240064 in words is "five hundred eighty-one million, two hundred forty thousand, sixty-four".