2040721567 has 2 divisors, whose sum is σ = 2040721568. Its totient is φ = 2040721566.

The previous prime is 2040721549. The next prime is 2040721583. The reversal of 2040721567 is 7651270402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2040721567 - 2⁷ = 2040721439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040721597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020360783 + 1020360784.

It is an arithmetic number, because the mean of its divisors is an integer number (1020360784).

Almost surely, 2^2040721567 is an apocalyptic number.

2040721567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040721567 is an equidigital number, since it uses as much as digits as its factorization.

2040721567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 2040721567 is about 45174.3463372742. The cubic root of 2040721567 is about 1268.4146558477.

Adding to 2040721567 its reverse (7651270402), we get a palindrome (9691991969).

The spelling of 2040721567 in words is "two billion, forty million, seven hundred twenty-one thousand, five hundred sixty-seven".