645554304611 has 8 divisors (see below), whose sum is σ = 648008461824. Its totient is φ = 643101366600.

The previous prime is 645554304587. The next prime is 645554304641. The reversal of 645554304611 is 116403455546.

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 645554304611 - 2²⁶ = 645487195747 is a prime.

It is a super-2 number, since 2×645554304611² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645554304641) by changing a digit.

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, 763286 + ... + 1368836.

It is an arithmetic number, because the mean of its divisors is an integer number (81001057728).

Almost surely, 2^645554304611 is an apocalyptic number.

645554304611 is a deficient number, since it is larger than the sum of its proper divisors (2454157213).

645554304611 is a wasteful number, since it uses less digits than its factorization.

645554304611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609601.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 645554304611 in words is "six hundred forty-five billion, five hundred fifty-four million, three hundred four thousand, six hundred eleven".