3538998661 has 16 divisors (see below), whose sum is σ = 4033110528. Its totient is φ = 3073932400.

The previous prime is 3538998649. The next prime is 3538998677. The reversal of 3538998661 is 1668998353.

3538998661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3538998661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3538998596 and 3538998605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3538998611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232206 + ... + 246976.

It is an arithmetic number, because the mean of its divisors is an integer number (252069408).

Almost surely, 2^3538998661 is an apocalyptic number.

It is an amenable number.

3538998661 is a deficient number, since it is larger than the sum of its proper divisors (494111867).

3538998661 is a wasteful number, since it uses less digits than its factorization.

3538998661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15752.

The product of its digits is 8398080, while the sum is 58.

The square root of 3538998661 is about 59489.4836168545. The cubic root of 3538998661 is about 1523.9128557085.

The spelling of 3538998661 in words is "three billion, five hundred thirty-eight million, nine hundred ninety-eight thousand, six hundred sixty-one".