2061622379521 has 4 divisors (see below), whose sum is σ = 2061625317444. Its totient is φ = 2061619441600.

The previous prime is 2061622379477. The next prime is 2061622379591. The reversal of 2061622379521 is 1259732261602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1524866871025 + 536755508496 = 1234855^2 + 732636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061622379521 - 2¹¹ = 2061622377473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061622379591) 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, 269181 + ... + 2048341.

It is an arithmetic number, because the mean of its divisors is an integer number (515406329361).

Almost surely, 2^{2061622379521} is an apocalyptic number.

It is an amenable number.

2061622379521 is a deficient number, since it is larger than the sum of its proper divisors (2937923).

2061622379521 is a wasteful number, since it uses less digits than its factorization.

2061622379521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937922.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 2061622379521 in words is "two trillion, sixty-one billion, six hundred twenty-two million, three hundred seventy-nine thousand, five hundred twenty-one".