65521315032511 has 32 divisors (see below), whose sum is σ = 75063178713600. Its totient is φ = 56690899228800.

The previous prime is 65521315032493. The next prime is 65521315032553. The reversal of 65521315032511 is 11523051312556.

It is a cyclic number.

It is not a de Polignac number, because 65521315032511 - 2¹⁷ = 65521314901439 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 (65521315032581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34679110 + ... + 36519628.

It is an arithmetic number, because the mean of its divisors is an integer number (2345724334800).

Almost surely, 2^{65521315032511} is an apocalyptic number.

65521315032511 is a deficient number, since it is larger than the sum of its proper divisors (9541863681089).

65521315032511 is a wasteful number, since it uses less digits than its factorization.

65521315032511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842079.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 65521315032511 in words is "sixty-five trillion, five hundred twenty-one billion, three hundred fifteen million, thirty-two thousand, five hundred eleven".