5209914517861 has 4 divisors (see below), whose sum is σ = 5249684857824. Its totient is φ = 5170144177900.

The previous prime is 5209914517823. The next prime is 5209914517901. The reversal of 5209914517861 is 1687154199025.

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.

It is a cyclic number.

It is not a de Polignac number, because 5209914517861 - 2¹³ = 5209914509669 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5209914517796 and 5209914517805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5209914517811) 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, 19885169785 + ... + 19885170046.

It is an arithmetic number, because the mean of its divisors is an integer number (1312421214456).

Almost surely, 2^{5209914517861} is an apocalyptic number.

It is an amenable number.

5209914517861 is a deficient number, since it is larger than the sum of its proper divisors (39770339963).

5209914517861 is a wasteful number, since it uses less digits than its factorization.

5209914517861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39770339962.

The product of its (nonzero) digits is 5443200, while the sum is 58.

The spelling of 5209914517861 in words is "five trillion, two hundred nine billion, nine hundred fourteen million, five hundred seventeen thousand, eight hundred sixty-one".