64556144545 has 16 divisors (see below), whose sum is σ = 77819797440. Its totient is φ = 51410200000.

The previous prime is 64556144537. The next prime is 64556144581. The reversal of 64556144545 is 54544165546.

It is not a de Polignac number, because 64556144545 - 2³ = 64556144537 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2372226 + ... + 2399284.

It is an arithmetic number, because the mean of its divisors is an integer number (4863737340).

Almost surely, 2^64556144545 is an apocalyptic number.

It is an amenable number.

64556144545 is a deficient number, since it is larger than the sum of its proper divisors (13263652895).

64556144545 is a wasteful number, since it uses less digits than its factorization.

64556144545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29216.

The product of its digits is 5760000, while the sum is 49.

The spelling of 64556144545 in words is "sixty-four billion, five hundred fifty-six million, one hundred forty-four thousand, five hundred forty-five".