64797272458080 has 384 divisors, whose sum is σ = 217725313236480. Its totient is φ = 16142227046400.

The previous prime is 64797272458067. The next prime is 64797272458081. The reversal of 64797272458080 is 8085427279746.

It is a junction number, because it is equal to n+sod(n) for n = 64797272457996 and 64797272458014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64797272458081) 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, 798929530 + ... + 799010630.

It is an arithmetic number, because the mean of its divisors is an integer number (566993003220).

Almost surely, 2^{64797272458080} is an apocalyptic number.

64797272458080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64797272458080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108862656618240).

64797272458080 is an abundant number, since it is smaller than the sum of its proper divisors (152928040778400).

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

64797272458080 is a wasteful number, since it uses less digits than its factorization.

64797272458080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81862 (or 81854 counting only the distinct ones).

The product of its (nonzero) digits is 379330560, while the sum is 69.

The spelling of 64797272458080 in words is "sixty-four trillion, seven hundred ninety-seven billion, two hundred seventy-two million, four hundred fifty-eight thousand, eighty".