15851869880213 has 4 divisors (see below), whose sum is σ = 16088464953120. Its totient is φ = 15615274807308.

The previous prime is 15851869880173. The next prime is 15851869880263. The reversal of 15851869880213 is 31208896815851.

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 15851869880213 - 2⁶ = 15851869880149 is a prime.

It is a super-2 number, since 2×15851869880213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15851869880213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15851869880263) 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, 118297536353 + ... + 118297536486.

It is an arithmetic number, because the mean of its divisors is an integer number (4022116238280).

Almost surely, 2^{15851869880213} is an apocalyptic number.

It is an amenable number.

15851869880213 is a deficient number, since it is larger than the sum of its proper divisors (236595072907).

15851869880213 is an equidigital number, since it uses as much as digits as its factorization.

15851869880213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236595072906.

The product of its (nonzero) digits is 33177600, while the sum is 65.

The spelling of 15851869880213 in words is "fifteen trillion, eight hundred fifty-one billion, eight hundred sixty-nine million, eight hundred eighty thousand, two hundred thirteen".