3645286949 has 4 divisors (see below), whose sum is σ = 3645495840. Its totient is φ = 3645078060.

The previous prime is 3645286943. The next prime is 3645286961. The reversal of 3645286949 is 9496825463.

It is a happy number.

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 3645286949 - 2²⁸ = 3376851493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3645286894 and 3645286903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645286943) 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, 75617 + ... + 114054.

It is an arithmetic number, because the mean of its divisors is an integer number (911373960).

Almost surely, 2^3645286949 is an apocalyptic number.

It is an amenable number.

3645286949 is a deficient number, since it is larger than the sum of its proper divisors (208891).

3645286949 is a wasteful number, since it uses less digits than its factorization.

3645286949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208890.

The product of its digits is 11197440, while the sum is 56.

The square root of 3645286949 is about 60376.2117807999. The cubic root of 3645286949 is about 1539.0187357961.

The spelling of 3645286949 in words is "three billion, six hundred forty-five million, two hundred eighty-six thousand, nine hundred forty-nine".