63620479728 has 80 divisors (see below), whose sum is σ = 196661614240. Its totient is φ = 19575530496.

The previous prime is 63620479723. The next prime is 63620479759. The reversal of 63620479728 is 82797402636.

63620479728 is a `hidden beast` number, since 6 + 3 + 620 + 4 + 7 + 9 + 7 + 2 + 8 = 666.

63620479728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (63620479723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5658601 + ... + 5669832.

It is an arithmetic number, because the mean of its divisors is an integer number (2458270178).

Almost surely, 2^63620479728 is an apocalyptic number.

It is an amenable number.

63620479728 is an abundant number, since it is smaller than the sum of its proper divisors (133041134512).

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

63620479728 is a wasteful number, since it uses less digits than its factorization.

63620479728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328463 (or 11328451 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 63620479728 in words is "sixty-three billion, six hundred twenty million, four hundred seventy-nine thousand, seven hundred twenty-eight".