6425663551 has 2 divisors, whose sum is σ = 6425663552. Its totient is φ = 6425663550.

The previous prime is 6425663533. The next prime is 6425663557. The reversal of 6425663551 is 1553665246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6425663551 - 2⁹ = 6425663039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6425663498 and 6425663507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6425663557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212831775 + 3212831776.

It is an arithmetic number, because the mean of its divisors is an integer number (3212831776).

Almost surely, 2^6425663551 is an apocalyptic number.

6425663551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425663551 is an equidigital number, since it uses as much as digits as its factorization.

6425663551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 43.

The square root of 6425663551 is about 80160.2367199599. The cubic root of 6425663551 is about 1859.1138831332.

The spelling of 6425663551 in words is "six billion, four hundred twenty-five million, six hundred sixty-three thousand, five hundred fifty-one".