516720453631 has 4 divisors (see below), whose sum is σ = 543916267000. Its totient is φ = 489524640264.

The previous prime is 516720453589. The next prime is 516720453647. The reversal of 516720453631 is 136354027615.

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

It is a cyclic number.

It is not a de Polignac number, because 516720453631 - 2¹⁹ = 516719929343 is a prime.

It is a super-2 number, since 2×516720453631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516720453031) 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, 13597906656 + ... + 13597906693.

It is an arithmetic number, because the mean of its divisors is an integer number (135979066750).

Almost surely, 2^516720453631 is an apocalyptic number.

516720453631 is a deficient number, since it is larger than the sum of its proper divisors (27195813369).

516720453631 is a wasteful number, since it uses less digits than its factorization.

516720453631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27195813368.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 516720453631 in words is "five hundred sixteen billion, seven hundred twenty million, four hundred fifty-three thousand, six hundred thirty-one".