2065151620521 has 24 divisors (see below), whose sum is σ = 3254336411040. Its totient is φ = 1251546235200.

The previous prime is 2065151620481. The next prime is 2065151620523. The reversal of 2065151620521 is 1250261515602.

2065151620521 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 1 + 5 + 1 + 620 + 5 + 21 = 666.

It is not a de Polignac number, because 2065151620521 - 2¹⁵ = 2065151587753 is a prime.

It is a super-2 number, since 2×2065151620521² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2065151620523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1584661 + ... + 2577101.

It is an arithmetic number, because the mean of its divisors is an integer number (135597350460).

Almost surely, 2^{2065151620521} is an apocalyptic number.

It is an amenable number.

2065151620521 is a deficient number, since it is larger than the sum of its proper divisors (1189184790519).

2065151620521 is a wasteful number, since it uses less digits than its factorization.

2065151620521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013477 (or 1013474 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 2065151620521 in words is "two trillion, sixty-five billion, one hundred fifty-one million, six hundred twenty thousand, five hundred twenty-one".