647771243320 has 32 divisors (see below), whose sum is σ = 1458398080800. Its totient is φ = 258946224768.

The previous prime is 647771243269. The next prime is 647771243321. The reversal of 647771243320 is 23342177746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647771243321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5006340 + ... + 5134099.

It is an arithmetic number, because the mean of its divisors is an integer number (45574940025).

Almost surely, 2^647771243320 is an apocalyptic number.

It is an amenable number.

647771243320 is an abundant number, since it is smaller than the sum of its proper divisors (810626837480).

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

647771243320 is a wasteful number, since it uses less digits than its factorization.

647771243320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142047 (or 10142043 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 46.

The spelling of 647771243320 in words is "six hundred forty-seven billion, seven hundred seventy-one million, two hundred forty-three thousand, three hundred twenty".