65143541525 has 12 divisors (see below), whose sum is σ = 82302106212. Its totient is φ = 51131533440.

The previous prime is 65143541521. The next prime is 65143541537. The reversal of 65143541525 is 52514534156.

It can be written as a sum of positive squares in 6 ways, for example, as 7674986449 + 57468555076 = 87607^2 + 239726^2 .

It is not a de Polignac number, because 65143541525 - 2² = 65143541521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65143541521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24581144 + ... + 24583793.

It is an arithmetic number, because the mean of its divisors is an integer number (6858508851).

Almost surely, 2^65143541525 is an apocalyptic number.

It is an amenable number.

65143541525 is a deficient number, since it is larger than the sum of its proper divisors (17158564687).

65143541525 is a wasteful number, since it uses less digits than its factorization.

65143541525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49165000 (or 49164995 counting only the distinct ones).

The product of its digits is 360000, while the sum is 41.

The spelling of 65143541525 in words is "sixty-five billion, one hundred forty-three million, five hundred forty-one thousand, five hundred twenty-five".