65435886381 has 4 divisors (see below), whose sum is σ = 87247848512. Its totient is φ = 43623924252.

The previous prime is 65435886371. The next prime is 65435886421. The reversal of 65435886381 is 18368853456.

65435886381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65435886381 - 2⁵ = 65435886349 is a prime.

It is a super-2 number, since 2×65435886381² (a number of 22 digits) contains 22 as substring.

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 (65435886331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10905981061 + ... + 10905981066.

It is an arithmetic number, because the mean of its divisors is an integer number (21811962128).

Almost surely, 2^65435886381 is an apocalyptic number.

It is an amenable number.

65435886381 is a deficient number, since it is larger than the sum of its proper divisors (21811962131).

65435886381 is a wasteful number, since it uses less digits than its factorization.

65435886381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21811962130.

The product of its digits is 16588800, while the sum is 57.

The spelling of 65435886381 in words is "sixty-five billion, four hundred thirty-five million, eight hundred eighty-six thousand, three hundred eighty-one".