2780023451 has 2 divisors, whose sum is σ = 2780023452. Its totient is φ = 2780023450.

The previous prime is 2780023439. The next prime is 2780023483. The reversal of 2780023451 is 1543200872.

It is an a-pointer prime, because the next prime (2780023483) can be obtained adding 2780023451 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2780023451 - 2⁶ = 2780023387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2780023751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390011725 + 1390011726.

It is an arithmetic number, because the mean of its divisors is an integer number (1390011726).

Almost surely, 2^2780023451 is an apocalyptic number.

2780023451 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780023451 is an equidigital number, since it uses as much as digits as its factorization.

2780023451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2780023451 is about 52725.9276921706. The cubic root of 2780023451 is about 1406.0998216290.

The spelling of 2780023451 in words is "two billion, seven hundred eighty million, twenty-three thousand, four hundred fifty-one".