64620898696 has 8 divisors (see below), whose sum is σ = 121164185070. Its totient is φ = 32310449344.

The previous prime is 64620898673. The next prime is 64620898703. The reversal of 64620898696 is 69689802646.

It can be written as a sum of positive squares in only one way, i.e., 41603760900 + 23017137796 = 203970^2 + 151714^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 4038806161 + ... + 4038806176.

Almost surely, 2^64620898696 is an apocalyptic number.

It is an amenable number.

64620898696 is a deficient number, since it is larger than the sum of its proper divisors (56543286374).

64620898696 is a wasteful number, since it uses less digits than its factorization.

64620898696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8077612343 (or 8077612339 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 64.

The spelling of 64620898696 in words is "sixty-four billion, six hundred twenty million, eight hundred ninety-eight thousand, six hundred ninety-six".