645434006545 has 8 divisors (see below), whose sum is σ = 775233345024. Its totient is φ = 515872180464.

The previous prime is 645434006501. The next prime is 645434006579. The reversal of 645434006545 is 545600434546.

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 645434006545 - 2⁷ = 645434006417 is a prime.

It is a super-2 number, since 2×645434006545² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645434006495 and 645434006504.

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 7 ways as a sum of consecutive naturals, for example, 59372119 + ... + 59382988.

It is an arithmetic number, because the mean of its divisors is an integer number (96904168128).

Almost surely, 2^645434006545 is an apocalyptic number.

It is an amenable number.

645434006545 is a deficient number, since it is larger than the sum of its proper divisors (129799338479).

645434006545 is a wasteful number, since it uses less digits than its factorization.

645434006545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118756199.

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 645434006545 in words is "six hundred forty-five billion, four hundred thirty-four million, six thousand, five hundred forty-five".