647520122000 has 160 divisors (see below), whose sum is σ = 1581153799680. Its totient is φ = 256464422400.

The previous prime is 647520121991. The next prime is 647520122033. The reversal of 647520122000 is 221025746.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89842397 + ... + 89849603.

It is an arithmetic number, because the mean of its divisors is an integer number (9882211248).

Almost surely, 2^647520122000 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 647520122000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790576899840).

647520122000 is an abundant number, since it is smaller than the sum of its proper divisors (933633677680).

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

647520122000 is a wasteful number, since it uses less digits than its factorization.

647520122000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666 (or 7650 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 647520122000 its reverse (221025746), we get a palindrome (647741147746).

The spelling of 647520122000 in words is "six hundred forty-seven billion, five hundred twenty million, one hundred twenty-two thousand".