64720207872 has 264 divisors, whose sum is σ = 195420965376. Its totient is φ = 21403533312.

The previous prime is 64720207843. The next prime is 64720207897. The reversal of 64720207872 is 27870202746.

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, 509607873 + ... + 509607999.

Almost surely, 2^64720207872 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 64720207872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97710482688).

64720207872 is an abundant number, since it is smaller than the sum of its proper divisors (130700757504).

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

64720207872 is an frugal number, since it uses more digits than its factorization.

64720207872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The spelling of 64720207872 in words is "sixty-four billion, seven hundred twenty million, two hundred seven thousand, eight hundred seventy-two".