56651531271840 has 240 divisors, whose sum is σ = 200729251910880. Its totient is φ = 15046886592000.

The previous prime is 56651531271749. The next prime is 56651531271869. The reversal of 56651531271840 is 4817213515665.

56651531271840 is a `hidden beast` number, since 5 + 6 + 6 + 5 + 1 + 531 + 27 + 1 + 84 + 0 = 666.

56651531271840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5454730 + ... + 11960649.

It is an arithmetic number, because the mean of its divisors is an integer number (836371882962).

Almost surely, 2^{56651531271840} is an apocalyptic number.

It is an amenable number.

56651531271840 is an abundant number, since it is smaller than the sum of its proper divisors (144077720639040).

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

56651531271840 is a wasteful number, since it uses less digits than its factorization.

56651531271840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17415657 (or 17415640 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 56651531271840 in words is "fifty-six trillion, six hundred fifty-one billion, five hundred thirty-one million, two hundred seventy-one thousand, eight hundred forty".