3661838854720 has 56 divisors (see below), whose sum is σ = 8725611022200. Its totient is φ = 1463751647232.

The previous prime is 3661838854703. The next prime is 3661838854721. The reversal of 3661838854720 is 274588381663.

It can be written as a sum of positive squares in 4 ways, for example, as 844516888576 + 2817321966144 = 918976^2 + 1678488^2 .

It is not an unprimeable number, because it can be changed into a prime (3661838854721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3366115 + ... + 4319074.

Almost surely, 2^{3661838854720} is an apocalyptic number.

It is an amenable number.

3661838854720 is an abundant number, since it is smaller than the sum of its proper divisors (5063772167480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3661838854720 is a wasteful number, since it uses less digits than its factorization.

3661838854720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686695 (or 7686685 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 3661838854720 in words is "three trillion, six hundred sixty-one billion, eight hundred thirty-eight million, eight hundred fifty-four thousand, seven hundred twenty".