64542603605 has 16 divisors (see below), whose sum is σ = 78699600000. Its totient is φ = 50804685120.

The previous prime is 64542603589. The next prime is 64542603659. The reversal of 64542603605 is 50630624546.

It is a happy number.

It is not a de Polignac number, because 64542603605 - 2⁴ = 64542603589 is a prime.

It is a super-2 number, since 2×64542603605² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 5030 + ... + 359319.

It is an arithmetic number, because the mean of its divisors is an integer number (4918725000).

Almost surely, 2^64542603605 is an apocalyptic number.

It is an amenable number.

64542603605 is a deficient number, since it is larger than the sum of its proper divisors (14156996395).

64542603605 is a wasteful number, since it uses less digits than its factorization.

64542603605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364924.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 64542603605 in words is "sixty-four billion, five hundred forty-two million, six hundred three thousand, six hundred five".