64625722544 has 20 divisors (see below), whose sum is σ = 125539274496. Its totient is φ = 32228490432.

The previous prime is 64625722519. The next prime is 64625722549. The reversal of 64625722544 is 44522752646.

It is not an unprimeable number, because it can be changed into a prime (64625722549) 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, 5266859 + ... + 5279114.

Almost surely, 2^64625722544 is an apocalyptic number.

It is an amenable number.

64625722544 is a deficient number, since it is larger than the sum of its proper divisors (60913551952).

64625722544 is a wasteful number, since it uses less digits than its factorization.

64625722544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10546364 (or 10546358 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 47.

The spelling of 64625722544 in words is "sixty-four billion, six hundred twenty-five million, seven hundred twenty-two thousand, five hundred forty-four".