647872512 has 180 divisors, whose sum is σ = 2017136520. Its totient is φ = 184418304.

The previous prime is 647872501. The next prime is 647872531. The reversal of 647872512 is 215278746.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2408314 + ... + 2408582.

It is an arithmetic number, because the mean of its divisors is an integer number (11206314).

Almost surely, 2^647872512 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 647872512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008568260).

647872512 is an abundant number, since it is smaller than the sum of its proper divisors (1369264008).

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

647872512 is an equidigital number, since it uses as much as digits as its factorization.

647872512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 281 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 647872512 is about 25453.3398987245. The cubic root of 647872512 is about 865.2929886126.

The spelling of 647872512 in words is "six hundred forty-seven million, eight hundred seventy-two thousand, five hundred twelve".