425129908649 has 2 divisors, whose sum is σ = 425129908650. Its totient is φ = 425129908648.

The previous prime is 425129908591. The next prime is 425129908657. The reversal of 425129908649 is 946809921524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 260186707225 + 164943201424 = 510085^2 + 406132^2 .

It is a cyclic number.

It is not a de Polignac number, because 425129908649 - 2⁸ = 425129908393 is a prime.

It is not a weakly prime, because it can be changed into another prime (425129998649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212564954324 + 212564954325.

It is an arithmetic number, because the mean of its divisors is an integer number (212564954325).

Almost surely, 2^425129908649 is an apocalyptic number.

It is an amenable number.

425129908649 is a deficient number, since it is larger than the sum of its proper divisors (1).

425129908649 is an equidigital number, since it uses as much as digits as its factorization.

425129908649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 425129908649 in words is "four hundred twenty-five billion, one hundred twenty-nine million, nine hundred eight thousand, six hundred forty-nine".