2043780451 has 2 divisors, whose sum is σ = 2043780452. Its totient is φ = 2043780450.

The previous prime is 2043780449. The next prime is 2043780503. The reversal of 2043780451 is 1540873402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2043780451 - 2¹ = 2043780449 is a prime.

Together with 2043780449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2043780251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021890225 + 1021890226.

It is an arithmetic number, because the mean of its divisors is an integer number (1021890226).

Almost surely, 2^2043780451 is an apocalyptic number.

2043780451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043780451 is an equidigital number, since it uses as much as digits as its factorization.

2043780451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 2043780451 is about 45208.1900876379. The cubic root of 2043780451 is about 1269.0480913276.

The spelling of 2043780451 in words is "two billion, forty-three million, seven hundred eighty thousand, four hundred fifty-one".