516416645 has 4 divisors (see below), whose sum is σ = 619699980. Its totient is φ = 413133312.

The previous prime is 516416629. The next prime is 516416653. The reversal of 516416645 is 546614615.

It is a happy number.

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 267060964 + 249355681 = 16342^2 + 15791^2 .

It is a cyclic number.

It is not a de Polignac number, because 516416645 - 2⁴ = 516416629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 516416599 and 516416608.

It is a congruent 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, 51641660 + ... + 51641669.

It is an arithmetic number, because the mean of its divisors is an integer number (154924995).

Almost surely, 2^516416645 is an apocalyptic number.

It is an amenable number.

516416645 is a deficient number, since it is larger than the sum of its proper divisors (103283335).

516416645 is a wasteful number, since it uses less digits than its factorization.

516416645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103283334.

The product of its digits is 86400, while the sum is 38.

The square root of 516416645 is about 22724.8024193831. The cubic root of 516416645 is about 802.2937530234.

The spelling of 516416645 in words is "five hundred sixteen million, four hundred sixteen thousand, six hundred forty-five".