2065072536781 has 8 divisors (see below), whose sum is σ = 2066688261144. Its totient is φ = 2063457126720.

The previous prime is 2065072536767. The next prime is 2065072536811. The reversal of 2065072536781 is 1876352705602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1047980116681 + 1017092420100 = 1023709^2 + 1008510^2 .

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 2065072536781 - 2²⁹ = 2064535665869 is a prime.

It is a super-2 number, since 2×2065072536781² (a number of 25 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 (2065072536701) 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, 14052175 + ... + 14198371.

It is an arithmetic number, because the mean of its divisors is an integer number (258336032643).

Almost surely, 2^{2065072536781} is an apocalyptic number.

It is an amenable number.

2065072536781 is a deficient number, since it is larger than the sum of its proper divisors (1615724363).

2065072536781 is a wasteful number, since it uses less digits than its factorization.

2065072536781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157151.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 2065072536781 in words is "two trillion, sixty-five billion, seventy-two million, five hundred thirty-six thousand, seven hundred eighty-one".