64349145280 has 672 divisors, whose sum is σ = 203346173952. Its totient is φ = 18911232000.

The previous prime is 64349145271. The next prime is 64349145307. The reversal of 64349145280 is 8254194346.

It is a self number, because there is not a number n which added to its sum of digits gives 64349145280.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 426153205 + ... + 426153355.

Almost surely, 2^64349145280 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 64349145280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101673086976).

64349145280 is an abundant number, since it is smaller than the sum of its proper divisors (138997028672).

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

64349145280 is a wasteful number, since it uses less digits than its factorization.

64349145280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 64349145280 in words is "sixty-four billion, three hundred forty-nine million, one hundred forty-five thousand, two hundred eighty".