3654603661761 has 12 divisors (see below), whose sum is σ = 5684939029588. Its totient is φ = 2248986868704.

The previous prime is 3654603661759. The next prime is 3654603661783. The reversal of 3654603661761 is 1671663064563.

3654603661761 is a `hidden beast` number, since 3 + 6 + 5 + 460 + 3 + 6 + 6 + 176 + 1 = 666.

3654603661761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 914999381136 + 2739604280625 = 956556^2 + 1655175^2 .

It is not a de Polignac number, because 3654603661761 - 2¹ = 3654603661759 is a prime.

It is a super-2 number, since 2×3654603661761² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3654603661698 and 3654603661707.

It is not an unprimeable number, because it can be changed into a prime (3654603661721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15617964250 + ... + 15617964483.

Almost surely, 2^{3654603661761} is an apocalyptic number.

It is an amenable number.

3654603661761 is a deficient number, since it is larger than the sum of its proper divisors (2030335367827).

3654603661761 is a wasteful number, since it uses less digits than its factorization.

3654603661761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31235928752 (or 31235928749 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The spelling of 3654603661761 in words is "three trillion, six hundred fifty-four billion, six hundred three million, six hundred sixty-one thousand, seven hundred sixty-one".