2061662397571 has 16 divisors (see below), whose sum is σ = 2359231930368. Its totient is φ = 1764855007200.

The previous prime is 2061662397569. The next prime is 2061662397583. The reversal of 2061662397571 is 1757932661602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2061662397571 - 2¹ = 2061662397569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061662397521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56712861 + ... + 56749201.

It is an arithmetic number, because the mean of its divisors is an integer number (147451995648).

Almost surely, 2^{2061662397571} is an apocalyptic number.

2061662397571 is a deficient number, since it is larger than the sum of its proper divisors (297569532797).

2061662397571 is an equidigital number, since it uses as much as digits as its factorization.

2061662397571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46602.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 2061662397571 in words is "two trillion, sixty-one billion, six hundred sixty-two million, three hundred ninety-seven thousand, five hundred seventy-one".