3655274661 has 16 divisors (see below), whose sum is σ = 5418961920. Its totient is φ = 2435166720.

The previous prime is 3655274639. The next prime is 3655274743. The reversal of 3655274661 is 1664725563.

3655274661 is a `hidden beast` number, since 3 + 65 + 527 + 4 + 6 + 61 = 666.

It is not a de Polignac number, because 3655274661 - 2⁵ = 3655274629 is a prime.

It is a super-2 number, since 2×3655274661² = 26722065694697329842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655274461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6300 + ... + 85733.

It is an arithmetic number, because the mean of its divisors is an integer number (338685120).

Almost surely, 2^3655274661 is an apocalyptic number.

It is an amenable number.

3655274661 is a deficient number, since it is larger than the sum of its proper divisors (1763687259).

3655274661 is a wasteful number, since it uses less digits than its factorization.

3655274661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93513 (or 93507 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The square root of 3655274661 is about 60458.8675133764. The cubic root of 3655274661 is about 1540.4230384722.

The spelling of 3655274661 in words is "three billion, six hundred fifty-five million, two hundred seventy-four thousand, six hundred sixty-one".