516505551101 has 4 divisors (see below), whose sum is σ = 522728509632. Its totient is φ = 510282592572.

The previous prime is 516505551083. The next prime is 516505551169. The reversal of 516505551101 is 101155505615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101155505615 = 5 ⋅20231101123.

It is a cyclic number.

It is not a de Polignac number, because 516505551101 - 2²⁶ = 516438442237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516505551901) 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, 3111479141 + ... + 3111479306.

It is an arithmetic number, because the mean of its divisors is an integer number (130682127408).

Almost surely, 2^516505551101 is an apocalyptic number.

It is an amenable number.

516505551101 is a deficient number, since it is larger than the sum of its proper divisors (6222958531).

516505551101 is an equidigital number, since it uses as much as digits as its factorization.

516505551101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222958530.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 516505551101 in words is "five hundred sixteen billion, five hundred five million, five hundred fifty-one thousand, one hundred one".