647125791312 has 320 divisors, whose sum is σ = 2249856000000. Its totient is φ = 154790092800.

The previous prime is 647125791281. The next prime is 647125791313. The reversal of 647125791312 is 213197521746.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647125791313) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20693064 + ... + 20724312.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800000).

Almost surely, 2^647125791312 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 647125791312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1124928000000).

647125791312 is an abundant number, since it is smaller than the sum of its proper divisors (1602730208688).

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

647125791312 is a wasteful number, since it uses less digits than its factorization.

647125791312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31722 (or 31716 counting only the distinct ones).

The product of its digits is 635040, while the sum is 48.

The spelling of 647125791312 in words is "six hundred forty-seven billion, one hundred twenty-five million, seven hundred ninety-one thousand, three hundred twelve".