516721560650 has 24 divisors (see below), whose sum is σ = 994243557420. Its totient is φ = 199561429760.

The previous prime is 516721560631. The next prime is 516721560659. The reversal of 516721560650 is 56065127615.

It can be written as a sum of positive squares in 6 ways, for example, as 213315583321 + 303405977329 = 461861^2 + 550823^2 .

It is not an unprimeable number, because it can be changed into a prime (516721560659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178178399 + ... + 178181298.

Almost surely, 2^516721560650 is an apocalyptic number.

516721560650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

516721560650 is a deficient number, since it is larger than the sum of its proper divisors (477521996770).

516721560650 is a wasteful number, since it uses less digits than its factorization.

516721560650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356359738 (or 356359733 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 516721560650 in words is "five hundred sixteen billion, seven hundred twenty-one million, five hundred sixty thousand, six hundred fifty".