516401065 has 4 divisors (see below), whose sum is σ = 619681284. Its totient is φ = 413120848.

The previous prime is 516401059. The next prime is 516401111. The reversal of 516401065 is 560104615.

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 358572096 + 157828969 = 18936^2 + 12563^2 .

It is a cyclic number.

It is not a de Polignac number, because 516401065 - 2⁵ = 516401033 is a prime.

It is a Duffinian number.

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, 51640102 + ... + 51640111.

It is an arithmetic number, because the mean of its divisors is an integer number (154920321).

Almost surely, 2^516401065 is an apocalyptic number.

It is an amenable number.

516401065 is a deficient number, since it is larger than the sum of its proper divisors (103280219).

516401065 is a wasteful number, since it uses less digits than its factorization.

516401065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103280218.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 516401065 is about 22724.4596195377. The cubic root of 516401065 is about 802.2856846916.

The spelling of 516401065 in words is "five hundred sixteen million, four hundred one thousand, sixty-five".