64758169825 has 6 divisors (see below), whose sum is σ = 80300130614. Its totient is φ = 51806535840.

The previous prime is 64758169799. The next prime is 64758169873. The reversal of 64758169825 is 52896185746.

It can be written as a sum of positive squares in 3 ways, for example, as 651474576 + 64106695249 = 25524^2 + 253193^2 .

It is not a de Polignac number, because 64758169825 - 2¹¹ = 64758167777 is a prime.

It is a Duffinian number.

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 in 5 ways as a sum of consecutive naturals, for example, 1295163372 + ... + 1295163421.

Almost surely, 2^64758169825 is an apocalyptic number.

It is an amenable number.

64758169825 is a deficient number, since it is larger than the sum of its proper divisors (15541960789).

64758169825 is a wasteful number, since it uses less digits than its factorization.

64758169825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590326803 (or 2590326798 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 61.

The spelling of 64758169825 in words is "sixty-four billion, seven hundred fifty-eight million, one hundred sixty-nine thousand, eight hundred twenty-five".