64525213353613 has 4 divisors (see below), whose sum is σ = 64525267176480. Its totient is φ = 64525159530748.

The previous prime is 64525213353541. The next prime is 64525213353631. The reversal of 64525213353613 is 31635331252546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64525213353613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64525213333613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25071223 + ... + 27524836.

It is an arithmetic number, because the mean of its divisors is an integer number (16131316794120).

Almost surely, 2^{64525213353613} is an apocalyptic number.

It is an amenable number.

64525213353613 is a deficient number, since it is larger than the sum of its proper divisors (53822867).

64525213353613 is a wasteful number, since it uses less digits than its factorization.

64525213353613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53822866.

The product of its digits is 5832000, while the sum is 49.

The spelling of 64525213353613 in words is "sixty-four trillion, five hundred twenty-five billion, two hundred thirteen million, three hundred fifty-three thousand, six hundred thirteen".