260778451 has 2 divisors, whose sum is σ = 260778452. Its totient is φ = 260778450.

The previous prime is 260778449. The next prime is 260778461. The reversal of 260778451 is 154877062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260778451 - 2¹ = 260778449 is a prime.

Together with 260778449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (260778461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130389225 + 130389226.

It is an arithmetic number, because the mean of its divisors is an integer number (130389226).

Almost surely, 2^260778451 is an apocalyptic number.

260778451 is a deficient number, since it is larger than the sum of its proper divisors (1).

260778451 is an equidigital number, since it uses as much as digits as its factorization.

260778451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 260778451 is about 16148.6361962861. The cubic root of 260778451 is about 638.8867781534.

The spelling of 260778451 in words is "two hundred sixty million, seven hundred seventy-eight thousand, four hundred fifty-one".