645300426 has 8 divisors (see below), whose sum is σ = 1290600864. Its totient is φ = 215100140.

The previous prime is 645300407. The next prime is 645300427. The reversal of 645300426 is 624003546.

It is a sphenic number, since it is the product of 3 distinct primes.

645300426 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645300393 and 645300402.

It is not an unprimeable number, because it can be changed into a prime (645300427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53775030 + ... + 53775041.

It is an arithmetic number, because the mean of its divisors is an integer number (161325108).

Almost surely, 2^645300426 is an apocalyptic number.

645300426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645300426 is a wasteful number, since it uses less digits than its factorization.

645300426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107550076.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 645300426 is about 25402.7641409355. The cubic root of 645300426 is about 864.1463845550.

The spelling of 645300426 in words is "six hundred forty-five million, three hundred thousand, four hundred twenty-six".