65213253525 has 72 divisors (see below), whose sum is σ = 125483349504. Its totient is φ = 29797286400.

The previous prime is 65213253517. The next prime is 65213253587. The reversal of 65213253525 is 52535231256.

It is a happy number.

It is not a de Polignac number, because 65213253525 - 2³ = 65213253517 is a prime.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 12459309 + ... + 12464541.

Almost surely, 2^65213253525 is an apocalyptic number.

It is an amenable number.

65213253525 is a deficient number, since it is larger than the sum of its proper divisors (60270095979).

65213253525 is a wasteful number, since it uses less digits than its factorization.

65213253525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651 (or 8639 counting only the distinct ones).

The product of its digits is 270000, while the sum is 39.

The spelling of 65213253525 in words is "sixty-five billion, two hundred thirteen million, two hundred fifty-three thousand, five hundred twenty-five".