2656400407 has 2 divisors, whose sum is σ = 2656400408. Its totient is φ = 2656400406.

The previous prime is 2656400371. The next prime is 2656400419. The reversal of 2656400407 is 7040046562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2656400407 - 2¹⁵ = 2656367639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656400107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328200203 + 1328200204.

It is an arithmetic number, because the mean of its divisors is an integer number (1328200204).

Almost surely, 2^2656400407 is an apocalyptic number.

2656400407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656400407 is an equidigital number, since it uses as much as digits as its factorization.

2656400407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 2656400407 is about 51540.2794617957. The cubic root of 2656400407 is about 1384.9407034091.

Adding to 2656400407 its reverse (7040046562), we get a palindrome (9696446969).

The spelling of 2656400407 in words is "two billion, six hundred fifty-six million, four hundred thousand, four hundred seven".