511665384001 has 4 divisors (see below), whose sum is σ = 516731378004. Its totient is φ = 506599390000.

The previous prime is 511665383993. The next prime is 511665384017. The reversal of 511665384001 is 100483566115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100483566115 = 5 ⋅20096713223.

It can be written as a sum of positive squares in 2 ways, for example, as 471177907776 + 40487476225 = 686424^2 + 201215^2 .

It is a cyclic number.

It is not a de Polignac number, because 511665384001 - 2³ = 511665383993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511665384071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532996850 + ... + 2532997051.

It is an arithmetic number, because the mean of its divisors is an integer number (129182844501).

Almost surely, 2^511665384001 is an apocalyptic number.

It is an amenable number.

511665384001 is a deficient number, since it is larger than the sum of its proper divisors (5065994003).

511665384001 is a wasteful number, since it uses less digits than its factorization.

511665384001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065994002.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 511665384001 in words is "five hundred eleven billion, six hundred sixty-five million, three hundred eighty-four thousand, one".