3651611636 has 6 divisors (see below), whose sum is σ = 6390320370. Its totient is φ = 1825805816.

The previous prime is 3651611617. The next prime is 3651611651. The reversal of 3651611636 is 6361161563.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3587291236 + 64320400 = 59894^2 + 8020^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3651611636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456451451 + ... + 456451458.

It is an arithmetic number, because the mean of its divisors is an integer number (1065053395).

Almost surely, 2^3651611636 is an apocalyptic number.

It is an amenable number.

3651611636 is a deficient number, since it is larger than the sum of its proper divisors (2738708734).

3651611636 is a wasteful number, since it uses less digits than its factorization.

3651611636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912902913 (or 912902911 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 3651611636 is about 60428.5663904084. The cubic root of 3651611636 is about 1539.9083034175.

The spelling of 3651611636 in words is "three billion, six hundred fifty-one million, six hundred eleven thousand, six hundred thirty-six".