64187004565 has 16 divisors (see below), whose sum is σ = 79760519280. Its totient is φ = 49529088000.

The previous prime is 64187004493. The next prime is 64187004571. The reversal of 64187004565 is 56540078146.

It can be written as a sum of positive squares in 8 ways, for example, as 4835601 + 64182168964 = 2199^2 + 253342^2 .

It is not a de Polignac number, because 64187004565 - 2¹⁷ = 64186873493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77436 + ... + 366565.

It is an arithmetic number, because the mean of its divisors is an integer number (4985032455).

Almost surely, 2^64187004565 is an apocalyptic number.

It is an amenable number.

64187004565 is a deficient number, since it is larger than the sum of its proper divisors (15573514715).

64187004565 is a wasteful number, since it uses less digits than its factorization.

64187004565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445032.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 64187004565 in words is "sixty-four billion, one hundred eighty-seven million, four thousand, five hundred sixty-five".