64551877471578 has 48 divisors (see below), whose sum is σ = 159016149558144. Its totient is φ = 17358488058240.

The previous prime is 64551877471483. The next prime is 64551877471621. The reversal of 64551877471578 is 87517477815546.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6457765858 + ... + 6457775853.

It is an arithmetic number, because the mean of its divisors is an integer number (3312836449128).

Almost surely, 2^{64551877471578} is an apocalyptic number.

64551877471578 is an abundant number, since it is smaller than the sum of its proper divisors (94464272086566).

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

64551877471578 is a wasteful number, since it uses less digits than its factorization.

64551877471578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12915541747 (or 12915541740 counting only the distinct ones).

The product of its digits is 1843968000, while the sum is 75.

The spelling of 64551877471578 in words is "sixty-four trillion, five hundred fifty-one billion, eight hundred seventy-seven million, four hundred seventy-one thousand, five hundred seventy-eight".