645611421535 has 8 divisors (see below), whose sum is σ = 774739674000. Its totient is φ = 516485158464.

The previous prime is 645611421529. The next prime is 645611421551. The reversal of 645611421535 is 535124116546.

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

It is a cyclic number.

It is not a de Polignac number, because 645611421535 - 2³ = 645611421527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645611421491 and 645611421500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346899 + ... + 1188091.

It is an arithmetic number, because the mean of its divisors is an integer number (96842459250).

Almost surely, 2^645611421535 is an apocalyptic number.

645611421535 is a deficient number, since it is larger than the sum of its proper divisors (129128252465).

645611421535 is a wasteful number, since it uses less digits than its factorization.

645611421535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994697.

The product of its digits is 432000, while the sum is 43.

The spelling of 645611421535 in words is "six hundred forty-five billion, six hundred eleven million, four hundred twenty-one thousand, five hundred thirty-five".