64777652953 has 4 divisors (see below), whose sum is σ = 69760549348. Its totient is φ = 59794756560.

The previous prime is 64777652923. The next prime is 64777652977. The reversal of 64777652953 is 35925677746.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14097287824 + 50680365129 = 118732^2 + 225123^2 .

It is a cyclic number.

It is not a de Polignac number, because 64777652953 - 2⁵ = 64777652921 is a prime.

It is a super-2 number, since 2×64777652953² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64777652891 and 64777652900.

It is not an unprimeable number, because it can be changed into a prime (64777652923) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2491448178 + ... + 2491448203.

It is an arithmetic number, because the mean of its divisors is an integer number (17440137337).

Almost surely, 2^64777652953 is an apocalyptic number.

It is an amenable number.

64777652953 is a deficient number, since it is larger than the sum of its proper divisors (4982896395).

64777652953 is a wasteful number, since it uses less digits than its factorization.

64777652953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982896394.

The product of its digits is 66679200, while the sum is 61.

The spelling of 64777652953 in words is "sixty-four billion, seven hundred seventy-seven million, six hundred fifty-two thousand, nine hundred fifty-three".