516354636139 has 4 divisors (see below), whose sum is σ = 523627236720. Its totient is φ = 509082035560.

The previous prime is 516354636137. The next prime is 516354636151. The reversal of 516354636139 is 931636453615.

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 516354636139 - 2¹ = 516354636137 is a prime.

It is a super-2 number, since 2×516354636139² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516354636137) 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, 3636300184 + ... + 3636300325.

It is an arithmetic number, because the mean of its divisors is an integer number (130906809180).

Almost surely, 2^516354636139 is an apocalyptic number.

516354636139 is a deficient number, since it is larger than the sum of its proper divisors (7272600581).

516354636139 is an equidigital number, since it uses as much as digits as its factorization.

516354636139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7272600580.

The product of its digits is 5248800, while the sum is 52.

The spelling of 516354636139 in words is "five hundred sixteen billion, three hundred fifty-four million, six hundred thirty-six thousand, one hundred thirty-nine".