56647659840 has 448 divisors, whose sum is σ = 189320302080. Its totient is φ = 14338621440.

The previous prime is 56647659787. The next prime is 56647659841. The reversal of 56647659840 is 4895674665.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56647659841) 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, 360813042 + ... + 360813198.

It is an arithmetic number, because the mean of its divisors is an integer number (422589960).

Almost surely, 2^56647659840 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 56647659840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94660151040).

56647659840 is an abundant number, since it is smaller than the sum of its proper divisors (132672642240).

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

56647659840 is a wasteful number, since it uses less digits than its factorization.

56647659840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 56647659840 in words is "fifty-six billion, six hundred forty-seven million, six hundred fifty-nine thousand, eight hundred forty".