639053670528 has 1792 divisors, whose sum is σ = 2629642579200. Its totient is φ = 149633630208.

The previous prime is 639053670473. The next prime is 639053670539. The reversal of 639053670528 is 825076350936.

It is a happy number.

639053670528 is a `hidden beast` number, since 6 + 3 + 9 + 0 + 53 + 67 + 0 + 528 = 666.

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 (13) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 2742719500 + ... + 2742719732.

It is an arithmetic number, because the mean of its divisors is an integer number (1467434475).

Almost surely, 2^639053670528 is an apocalyptic number.

639053670528 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639053670528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1314821289600).

639053670528 is an abundant number, since it is smaller than the sum of its proper divisors (1990588908672).

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

639053670528 is a wasteful number, since it uses less digits than its factorization.

639053670528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 639053670528 in words is "six hundred thirty-nine billion, fifty-three million, six hundred seventy thousand, five hundred twenty-eight".