65641512610 has 16 divisors (see below), whose sum is σ = 118166801400. Its totient is φ = 26253920896.

The previous prime is 65641512589. The next prime is 65641512611. The reversal of 65641512610 is 1621514656.

It can be written as a sum of positive squares in 4 ways, for example, as 33636660409 + 32004852201 = 183403^2 + 178899^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65641512610.

It is not an unprimeable number, because it can be changed into a prime (65641512611) 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 7 ways as a sum of consecutive naturals, for example, 231265 + ... + 429844.

Almost surely, 2^65641512610 is an apocalyptic number.

65641512610 is a deficient number, since it is larger than the sum of its proper divisors (52525288790).

65641512610 is a wasteful number, since it uses less digits than its factorization.

65641512610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671045.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 65641512610 in words is "sixty-five billion, six hundred forty-one million, five hundred twelve thousand, six hundred ten".