64510547503872 has 288 divisors, whose sum is σ = 182108744294400. Its totient is φ = 20216578904064.

The previous prime is 64510547503813. The next prime is 64510547503877. The reversal of 64510547503872 is 27830574501546.

It is a happy number.

It is a super-2 number, since 2×64510547503872² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (64510547503877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1508397433 + ... + 1508440199.

It is an arithmetic number, because the mean of its divisors is an integer number (632322028800).

Almost surely, 2^{64510547503872} 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 64510547503872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91054372147200).

64510547503872 is an abundant number, since it is smaller than the sum of its proper divisors (117598196790528).

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

64510547503872 is a wasteful number, since it uses less digits than its factorization.

64510547503872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43591 (or 43577 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 57.

The spelling of 64510547503872 in words is "sixty-four trillion, five hundred ten billion, five hundred forty-seven million, five hundred three thousand, eight hundred seventy-two".