64152784657 has 4 divisors (see below), whose sum is σ = 69087614260. Its totient is φ = 59217955056.

The previous prime is 64152784651. The next prime is 64152784687. The reversal of 64152784657 is 75648725146.

It is a Cunningham number, because it is equal to 253284²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75648725146 = 2 ⋅37824362573.

It can be written as a sum of positive squares in 2 ways, for example, as 9489877056 + 54662907601 = 97416^2 + 233801^2 .

It is not a de Polignac number, because 64152784657 - 2³ = 64152784649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64152784598 and 64152784607.

It is not an unprimeable number, because it can be changed into a prime (64152784651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467414782 + ... + 2467414807.

It is an arithmetic number, because the mean of its divisors is an integer number (17271903565).

Almost surely, 2^64152784657 is an apocalyptic number.

It is an amenable number.

64152784657 is a deficient number, since it is larger than the sum of its proper divisors (4934829603).

64152784657 is a wasteful number, since it uses less digits than its factorization.

64152784657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934829602.

The product of its digits is 11289600, while the sum is 55.

The spelling of 64152784657 in words is "sixty-four billion, one hundred fifty-two million, seven hundred eighty-four thousand, six hundred fifty-seven".