3648857786369 has 4 divisors (see below), whose sum is σ = 3840902933040. Its totient is φ = 3456812639700.

The previous prime is 3648857786363. The next prime is 3648857786377. The reversal of 3648857786369 is 9636877588463.

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 a de Polignac number, because none of the positive numbers 2^k-3648857786369 is a prime.

It is a super-2 number, since 2×3648857786369² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3648857786293 and 3648857786302.

It is not an unprimeable number, because it can be changed into a prime (3648857786363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96022573307 + ... + 96022573344.

It is an arithmetic number, because the mean of its divisors is an integer number (960225733260).

Almost surely, 2^{3648857786369} is an apocalyptic number.

It is an amenable number.

3648857786369 is a deficient number, since it is larger than the sum of its proper divisors (192045146671).

3648857786369 is a wasteful number, since it uses less digits than its factorization.

3648857786369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192045146670.

The product of its digits is 8778792960, while the sum is 80.

The spelling of 3648857786369 in words is "three trillion, six hundred forty-eight billion, eight hundred fifty-seven million, seven hundred eighty-six thousand, three hundred sixty-nine".