2061997801 has 4 divisors (see below), whose sum is σ = 2086841232. Its totient is φ = 2037154372.

The previous prime is 2061997787. The next prime is 2061997841. The reversal of 2061997801 is 1087991602.

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 2061997801 - 2¹¹ = 2061995753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2061997841) 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, 12421591 + ... + 12421756.

It is an arithmetic number, because the mean of its divisors is an integer number (521710308).

Almost surely, 2^2061997801 is an apocalyptic number.

It is an amenable number.

2061997801 is a deficient number, since it is larger than the sum of its proper divisors (24843431).

2061997801 is an equidigital number, since it uses as much as digits as its factorization.

2061997801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24843430.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 2061997801 is about 45409.2259458362. The cubic root of 2061997801 is about 1272.8075201614.

The spelling of 2061997801 in words is "two billion, sixty-one million, nine hundred ninety-seven thousand, eight hundred one".