3618732644 has 6 divisors (see below), whose sum is σ = 6332782134. Its totient is φ = 1809366320.

The previous prime is 3618732629. The next prime is 3618732661. The reversal of 3618732644 is 4462378163.

It can be written as a sum of positive squares in only one way, i.e., 3470623744 + 148108900 = 58912^2 + 12170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3618732595 and 3618732604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452341577 + ... + 452341584.

It is an arithmetic number, because the mean of its divisors is an integer number (1055463689).

Almost surely, 2^3618732644 is an apocalyptic number.

It is an amenable number.

3618732644 is a deficient number, since it is larger than the sum of its proper divisors (2714049490).

3618732644 is a wasteful number, since it uses less digits than its factorization.

3618732644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904683165 (or 904683163 counting only the distinct ones).

The product of its digits is 580608, while the sum is 44.

The square root of 3618732644 is about 60155.9028192579. The cubic root of 3618732644 is about 1535.2726008448.

The spelling of 3618732644 in words is "three billion, six hundred eighteen million, seven hundred thirty-two thousand, six hundred forty-four".