65612144335261 has 4 divisors (see below), whose sum is σ = 67008147406272. Its totient is φ = 64216141264252.

The previous prime is 65612144335211. The next prime is 65612144335267. The reversal of 65612144335261 is 16253344121656.

It is a happy number.

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 65612144335261 - 2²⁵ = 65612110780829 is a prime.

It is a super-2 number, since 2×65612144335261² (a number of 28 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 (65612144335267) 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, 698001535435 + ... + 698001535528.

It is an arithmetic number, because the mean of its divisors is an integer number (16752036851568).

Almost surely, 2^{65612144335261} is an apocalyptic number.

It is an amenable number.

65612144335261 is a deficient number, since it is larger than the sum of its proper divisors (1396003071011).

65612144335261 is a wasteful number, since it uses less digits than its factorization.

65612144335261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396003071010.

The product of its digits is 3110400, while the sum is 49.

The spelling of 65612144335261 in words is "sixty-five trillion, six hundred twelve billion, one hundred forty-four million, three hundred thirty-five thousand, two hundred sixty-one".