2578407851 has 2 divisors, whose sum is σ = 2578407852. Its totient is φ = 2578407850.

The previous prime is 2578407823. The next prime is 2578407889. The reversal of 2578407851 is 1587048752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2578407851 - 2¹⁴ = 2578391467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2578407796 and 2578407805.

It is not a weakly prime, because it can be changed into another prime (2578401851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289203925 + 1289203926.

It is an arithmetic number, because the mean of its divisors is an integer number (1289203926).

Almost surely, 2^2578407851 is an apocalyptic number.

2578407851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578407851 is an equidigital number, since it uses as much as digits as its factorization.

2578407851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627200, while the sum is 47.

The square root of 2578407851 is about 50778.0252766883. The cubic root of 2578407851 is about 1371.2517819881.

The spelling of 2578407851 in words is "two billion, five hundred seventy-eight million, four hundred seven thousand, eight hundred fifty-one".