64745358055520 has 24 divisors (see below), whose sum is σ = 152960908406544. Its totient is φ = 25898143222144.

The previous prime is 64745358055493. The next prime is 64745358055529. The reversal of 64745358055520 is 2555085354746.

It is a happy number.

It is a super-2 number, since 2×64745358055520² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64745358055520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64745358055529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202329243764 + ... + 202329244083.

It is an arithmetic number, because the mean of its divisors is an integer number (6373371183606).

Almost surely, 2^{64745358055520} is an apocalyptic number.

It is an amenable number.

64745358055520 is an abundant number, since it is smaller than the sum of its proper divisors (88215550351024).

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

64745358055520 is a wasteful number, since it uses less digits than its factorization.

64745358055520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404658487862 (or 404658487854 counting only the distinct ones).

The product of its (nonzero) digits is 100800000, while the sum is 59.

The spelling of 64745358055520 in words is "sixty-four trillion, seven hundred forty-five billion, three hundred fifty-eight million, fifty-five thousand, five hundred twenty".