511216450361 has 4 divisors (see below), whose sum is σ = 511221578724. Its totient is φ = 511211322000.

The previous prime is 511216450343. The next prime is 511216450399. The reversal of 511216450361 is 163054612115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48408360361 + 462808090000 = 220019^2 + 680300^2 .

It is a cyclic number.

It is not a de Polignac number, because 511216450361 - 2²⁶ = 511149341497 is a prime.

It is a super-2 number, since 2×511216450361² (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 (511216450321) 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, 2411630 + ... + 2615031.

It is an arithmetic number, because the mean of its divisors is an integer number (127805394681).

Almost surely, 2^511216450361 is an apocalyptic number.

It is an amenable number.

511216450361 is a deficient number, since it is larger than the sum of its proper divisors (5128363).

511216450361 is a wasteful number, since it uses less digits than its factorization.

511216450361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128362.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 511216450361 in words is "five hundred eleven billion, two hundred sixteen million, four hundred fifty thousand, three hundred sixty-one".