3661904720001 has 32 divisors (see below), whose sum is σ = 5441581099008. Its totient is φ = 2171378987840.

The previous prime is 3661904719997. The next prime is 3661904720107. The reversal of 3661904720001 is 1000274091663.

It is a cyclic number.

It is not a de Polignac number, because 3661904720001 - 2² = 3661904719997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3661904722001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4187086 + ... + 4985528.

It is an arithmetic number, because the mean of its divisors is an integer number (170049409344).

Almost surely, 2^{3661904720001} is an apocalyptic number.

It is an amenable number.

3661904720001 is a deficient number, since it is larger than the sum of its proper divisors (1779676379007).

3661904720001 is a wasteful number, since it uses less digits than its factorization.

3661904720001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801461.

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 3661904720001 in words is "three trillion, six hundred sixty-one billion, nine hundred four million, seven hundred twenty thousand, one".