64520083144 has 32 divisors (see below), whose sum is σ = 132936228000. Its totient is φ = 29113237120.

The previous prime is 64520083091. The next prime is 64520083183. The reversal of 64520083144 is 44138002546.

It is a super-2 number, since 2×64520083144² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2663794 + ... + 2687905.

It is an arithmetic number, because the mean of its divisors is an integer number (4154257125).

Almost surely, 2^64520083144 is an apocalyptic number.

It is an amenable number.

64520083144 is an abundant number, since it is smaller than the sum of its proper divisors (68416144856).

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

64520083144 is a wasteful number, since it uses less digits than its factorization.

64520083144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5351853 (or 5351849 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 64520083144 in words is "sixty-four billion, five hundred twenty million, eighty-three thousand, one hundred forty-four".