3621447720736 has 12 divisors (see below), whose sum is σ = 7129725200262. Its totient is φ = 1810723860352.

The previous prime is 3621447720733. The next prime is 3621447720769. The reversal of 3621447720736 is 6370277441263.

It can be written as a sum of positive squares in only one way, i.e., 2747783630736 + 873664090000 = 1657644^2 + 934700^2 .

It is a super-2 number, since 2×3621447720736² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3621447720733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56585120605 + ... + 56585120668.

Almost surely, 2^{3621447720736} is an apocalyptic number.

It is an amenable number.

3621447720736 is a deficient number, since it is larger than the sum of its proper divisors (3508277479526).

3621447720736 is a wasteful number, since it uses less digits than its factorization.

3621447720736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113170241283 (or 113170241275 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 52.

The spelling of 3621447720736 in words is "three trillion, six hundred twenty-one billion, four hundred forty-seven million, seven hundred twenty thousand, seven hundred thirty-six".