64469907777220 has 192 divisors, whose sum is σ = 153631620172800. Its totient is φ = 22510443200000.

The previous prime is 64469907777217. The next prime is 64469907777283. The reversal of 64469907777220 is 2277770996446.

64469907777220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64469907777220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1055278875 + ... + 1055339965.

It is an arithmetic number, because the mean of its divisors is an integer number (800164688400).

Almost surely, 2^{64469907777220} 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 64469907777220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76815810086400).

64469907777220 is an abundant number, since it is smaller than the sum of its proper divisors (89161712395580).

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

64469907777220 is a wasteful number, since it uses less digits than its factorization.

64469907777220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62050 (or 62048 counting only the distinct ones).

The product of its (nonzero) digits is 448084224, while the sum is 70.

The spelling of 64469907777220 in words is "sixty-four trillion, four hundred sixty-nine billion, nine hundred seven million, seven hundred seventy-seven thousand, two hundred twenty".