576721223640 has 256 divisors, whose sum is σ = 2030571417600. Its totient is φ = 145369728000.

The previous prime is 576721223633. The next prime is 576721223641. The reversal of 576721223640 is 46322127675.

576721223640 is a `hidden beast` number, since 5 + 76 + 7 + 212 + 2 + 364 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (576721223641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1239340 + ... + 1639940.

It is an arithmetic number, because the mean of its divisors is an integer number (7931919600).

Almost surely, 2^576721223640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 576721223640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015285708800).

576721223640 is an abundant number, since it is smaller than the sum of its proper divisors (1453850193960).

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

576721223640 is a wasteful number, since it uses less digits than its factorization.

576721223640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400695 (or 400685 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 576721223640 in words is "five hundred seventy-six billion, seven hundred twenty-one million, two hundred twenty-three thousand, six hundred forty".