65525440061 has 4 divisors (see below), whose sum is σ = 66636040800. Its totient is φ = 64414839324.

The previous prime is 65525440031. The next prime is 65525440109. The reversal of 65525440061 is 16004452556.

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 a cyclic number.

It is not a de Polignac number, because 65525440061 - 2³⁴ = 48345570877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65525439997 and 65525440024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65525440031) 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, 555300281 + ... + 555300398.

It is an arithmetic number, because the mean of its divisors is an integer number (16659010200).

Almost surely, 2^65525440061 is an apocalyptic number.

It is an amenable number.

65525440061 is a deficient number, since it is larger than the sum of its proper divisors (1110600739).

65525440061 is a wasteful number, since it uses less digits than its factorization.

65525440061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110600738.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 65525440061 in words is "sixty-five billion, five hundred twenty-five million, four hundred forty thousand, sixty-one".