65516181125 has 8 divisors (see below), whose sum is σ = 81764194200. Its totient is φ = 52412944800.

The previous prime is 65516181113. The next prime is 65516181127. The reversal of 65516181125 is 52118161556.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1899739396 + 63616441729 = 43586^2 + 252223^2 .

It is not a de Polignac number, because 65516181125 - 2⁶ = 65516181061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65516181127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262064600 + ... + 262064849.

It is an arithmetic number, because the mean of its divisors is an integer number (10220524275).

Almost surely, 2^65516181125 is an apocalyptic number.

It is an amenable number.

65516181125 is a deficient number, since it is larger than the sum of its proper divisors (16248013075).

65516181125 is an equidigital number, since it uses as much as digits as its factorization.

65516181125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524129464 (or 524129454 counting only the distinct ones).

The product of its digits is 72000, while the sum is 41.

The spelling of 65516181125 in words is "sixty-five billion, five hundred sixteen million, one hundred eighty-one thousand, one hundred twenty-five".