64590697609 has 3 divisors (see below), whose sum is σ = 64590951757. Its totient is φ = 64590443462.

The previous prime is 64590697603. The next prime is 64590697649. The reversal of 64590697609 is 90679609546.

The square root of 64590697609 is 254147.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 64590697609 - 2²¹ = 64588600457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64590697603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 127074 + ... + 381220.

Almost surely, 2^64590697609 is an apocalyptic number.

64590697609 is the 254147-th square number.

64590697609 is the 127074-th centered octagonal number.

It is an amenable number.

64590697609 is a deficient number, since it is larger than the sum of its proper divisors (254148).

64590697609 is an frugal number, since it uses more digits than its factorization.

64590697609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508294 (or 254147 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 64590697609 in words is "sixty-four billion, five hundred ninety million, six hundred ninety-seven thousand, six hundred nine".