3621516749 has 4 divisors (see below), whose sum is σ = 3834547164. Its totient is φ = 3408486336.

The previous prime is 3621516739. The next prime is 3621516799. The reversal of 3621516749 is 9476151263.

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 2871030724 + 750486025 = 53582^2 + 27395^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621516749 - 2¹⁶ = 3621451213 is a prime.

It is a super-3 number, since 3×3621516749³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621516719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106515182 + ... + 106515215.

It is an arithmetic number, because the mean of its divisors is an integer number (958636791).

Almost surely, 2^3621516749 is an apocalyptic number.

It is an amenable number.

3621516749 is a deficient number, since it is larger than the sum of its proper divisors (213030415).

3621516749 is a wasteful number, since it uses less digits than its factorization.

3621516749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213030414.

The product of its digits is 272160, while the sum is 44.

The square root of 3621516749 is about 60179.0391166227. The cubic root of 3621516749 is about 1535.6662252469. Note that the first 3 decimals are identical.

The spelling of 3621516749 in words is "three billion, six hundred twenty-one million, five hundred sixteen thousand, seven hundred forty-nine".