3649337784977 has 4 divisors (see below), whose sum is σ = 3685469842356. Its totient is φ = 3613205727600.

The previous prime is 3649337784947. The next prime is 3649337784997. The reversal of 3649337784977 is 7794877339463.

It is a Cunningham number, because it is equal to 1910324²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3506241270016 + 143096514961 = 1872496^2 + 378281^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649337784977 - 2²⁰ = 3649336736401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3649337784898 and 3649337784907.

It is not an unprimeable number, because it can be changed into a prime (3649337784947) 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, 18066028538 + ... + 18066028739.

It is an arithmetic number, because the mean of its divisors is an integer number (921367460589).

Almost surely, 2^{3649337784977} is an apocalyptic number.

It is an amenable number.

3649337784977 is a deficient number, since it is larger than the sum of its proper divisors (36132057379).

3649337784977 is a wasteful number, since it uses less digits than its factorization.

3649337784977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36132057378.

The product of its digits is 4032758016, while the sum is 77.

The spelling of 3649337784977 in words is "three trillion, six hundred forty-nine billion, three hundred thirty-seven million, seven hundred eighty-four thousand, nine hundred seventy-seven".