516517285385 has 4 divisors (see below), whose sum is σ = 619820742468. Its totient is φ = 413213828304.

The previous prime is 516517285369. The next prime is 516517285391. The reversal of 516517285385 is 583582715615.

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 127075138576 + 389442146809 = 356476^2 + 624053^2 .

It is a cyclic number.

It is not a de Polignac number, because 516517285385 - 2⁴ = 516517285369 is a prime.

It is a super-2 number, since 2×516517285385² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516517285385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51651728534 + ... + 51651728543.

It is an arithmetic number, because the mean of its divisors is an integer number (154955185617).

Almost surely, 2^516517285385 is an apocalyptic number.

It is an amenable number.

516517285385 is a deficient number, since it is larger than the sum of its proper divisors (103303457083).

516517285385 is a wasteful number, since it uses less digits than its factorization.

516517285385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103303457082.

The product of its digits is 10080000, while the sum is 56.

The spelling of 516517285385 in words is "five hundred sixteen billion, five hundred seventeen million, two hundred eighty-five thousand, three hundred eighty-five".