65635362081 has 12 divisors (see below), whose sum is σ = 95144027940. Its totient is φ = 43601187840.

The previous prime is 65635362061. The next prime is 65635362103. The reversal of 65635362081 is 18026353656.

65635362081 is a `hidden beast` number, since 6 + 5 + 635 + 3 + 6 + 2 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56689229025 + 8946133056 = 238095^2 + 94584^2 .

It is not a de Polignac number, because 65635362081 - 2²¹ = 65633264929 is a prime.

It is a super-2 number, since 2×65635362081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65635362031) 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, 12974016 + ... + 12979073.

It is an arithmetic number, because the mean of its divisors is an integer number (7928668995).

Almost surely, 2^65635362081 is an apocalyptic number.

It is an amenable number.

65635362081 is a deficient number, since it is larger than the sum of its proper divisors (29508665859).

65635362081 is a wasteful number, since it uses less digits than its factorization.

65635362081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25953376 (or 25953373 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

It can be divided in two parts, 65635 and 362081, that added together give a square (427716 = 654²).

The spelling of 65635362081 in words is "sixty-five billion, six hundred thirty-five million, three hundred sixty-two thousand, eighty-one".