65355947261 has 8 divisors (see below), whose sum is σ = 73224354144. Its totient is φ = 57808699920.

The previous prime is 65355947257. The next prime is 65355947273. The reversal of 65355947261 is 16274955356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65355947261 - 2² = 65355947257 is a prime.

It is a super-2 number, since 2×65355947261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65355947561) 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, 80289455 + ... + 80290268.

It is an arithmetic number, because the mean of its divisors is an integer number (9153044268).

Almost surely, 2^65355947261 is an apocalyptic number.

It is an amenable number.

65355947261 is a deficient number, since it is larger than the sum of its proper divisors (7868406883).

65355947261 is a wasteful number, since it uses less digits than its factorization.

65355947261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160579771.

The product of its digits is 6804000, while the sum is 53.

The spelling of 65355947261 in words is "sixty-five billion, three hundred fifty-five million, nine hundred forty-seven thousand, two hundred sixty-one".