3644476963649 has 4 divisors (see below), whose sum is σ = 3645619078080. Its totient is φ = 3643334849220.

The previous prime is 3644476963643. The next prime is 3644476963661. The reversal of 3644476963649 is 9463696744463.

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 3644476963649 - 2¹² = 3644476959553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644476963643) 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, 571052429 + ... + 571058810.

It is an arithmetic number, because the mean of its divisors is an integer number (911404769520).

Almost surely, 2^{3644476963649} is an apocalyptic number.

It is an amenable number.

3644476963649 is a deficient number, since it is larger than the sum of its proper divisors (1142114431).

3644476963649 is a wasteful number, since it uses less digits than its factorization.

3644476963649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142114430.

The product of its digits is 1693052928, while the sum is 71.

The spelling of 3644476963649 in words is "three trillion, six hundred forty-four billion, four hundred seventy-six million, nine hundred sixty-three thousand, six hundred forty-nine".