64187474753 has 18 divisors (see below), whose sum is σ = 69629230854. Its totient is φ = 58965524352.

The previous prime is 64187474591. The next prime is 64187474789. The reversal of 64187474753 is 35747478146.

It can be written as a sum of positive squares in 3 ways, for example, as 19998784 + 64167475969 = 4472^2 + 253313^2 .

It is not a de Polignac number, because 64187474753 - 2¹⁴ = 64187458369 is a prime.

It is a super-3 number, since 3×64187474753³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64187474453) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 44917043 + ... + 44918471.

It is an arithmetic number, because the mean of its divisors is an integer number (3868290603).

Almost surely, 2^64187474753 is an apocalyptic number.

It is an amenable number.

64187474753 is a deficient number, since it is larger than the sum of its proper divisors (5441756101).

64187474753 is an frugal number, since it uses more digits than its factorization.

64187474753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961 (or 1489 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 56.

The spelling of 64187474753 in words is "sixty-four billion, one hundred eighty-seven million, four hundred seventy-four thousand, seven hundred fifty-three".