64455216537 has 32 divisors (see below), whose sum is σ = 89975789568. Its totient is φ = 40965129216.

The previous prime is 64455216509. The next prime is 64455216569. The reversal of 64455216537 is 73561255446.

It is not a de Polignac number, because 64455216537 - 2⁸ = 64455216281 is a prime.

It is a super-3 number, since 3×64455216537³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64455216577) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 42320458 + ... + 42321980.

It is an arithmetic number, because the mean of its divisors is an integer number (2811743424).

Almost surely, 2^64455216537 is an apocalyptic number.

It is an amenable number.

64455216537 is a deficient number, since it is larger than the sum of its proper divisors (25520573031).

64455216537 is a wasteful number, since it uses less digits than its factorization.

64455216537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189.

The product of its digits is 3024000, while the sum is 48.

The spelling of 64455216537 in words is "sixty-four billion, four hundred fifty-five million, two hundred sixteen thousand, five hundred thirty-seven".