645437583465 has 16 divisors (see below), whose sum is σ = 1033544562048. Its totient is φ = 343951901696.

The previous prime is 645437583367. The next prime is 645437583473. The reversal of 645437583465 is 564385734546.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 645437583465 - 2¹⁰ = 645437582441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 645437583399 and 645437583408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17573304 + ... + 17609993.

It is an arithmetic number, because the mean of its divisors is an integer number (64596535128).

Almost surely, 2^645437583465 is an apocalyptic number.

It is an amenable number.

645437583465 is a deficient number, since it is larger than the sum of its proper divisors (388106978583).

645437583465 is a wasteful number, since it uses less digits than its factorization.

645437583465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35184528.

The product of its digits is 145152000, while the sum is 60.

The spelling of 645437583465 in words is "six hundred forty-five billion, four hundred thirty-seven million, five hundred eighty-three thousand, four hundred sixty-five".