635485220064 has 120 divisors (see below), whose sum is σ = 1912408538040. Its totient is φ = 206902128384.

The previous prime is 635485220039. The next prime is 635485220087. The reversal of 635485220064 is 460022584536.

635485220064 is a `hidden beast` number, since 63 + 5 + 4 + 8 + 522 + 0 + 0 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2739379 + ... + 2962290.

It is an arithmetic number, because the mean of its divisors is an integer number (15936737817).

Almost surely, 2^635485220064 is an apocalyptic number.

It is an amenable number.

635485220064 is an abundant number, since it is smaller than the sum of its proper divisors (1276923317976).

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

635485220064 is a wasteful number, since it uses less digits than its factorization.

635485220064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701734 (or 5701717 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 635485220064 in words is "six hundred thirty-five billion, four hundred eighty-five million, two hundred twenty thousand, sixty-four".