511456451445643 has 16 divisors (see below), whose sum is σ = 559044230155776. Its totient is φ = 464050708244640.

The previous prime is 511456451445623. The next prime is 511456451445649. The reversal of 511456451445643 is 346544154654115.

It is a de Polignac number, because none of the positive numbers 2^k-511456451445643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511456451445649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127893246 + ... + 131831692.

It is an arithmetic number, because the mean of its divisors is an integer number (34940264384736).

Almost surely, 2^{511456451445643} is an apocalyptic number.

511456451445643 is a deficient number, since it is larger than the sum of its proper divisors (47587778710133).

511456451445643 is a wasteful number, since it uses less digits than its factorization.

511456451445643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961554.

The product of its digits is 69120000, while the sum is 58.

The spelling of 511456451445643 in words is "five hundred eleven trillion, four hundred fifty-six billion, four hundred fifty-one million, four hundred forty-five thousand, six hundred forty-three".