3661898056 has 24 divisors (see below), whose sum is σ = 7271345970. Its totient is φ = 1722914048.

The previous prime is 3661898047. The next prime is 3661898077. The reversal of 3661898056 is 6508981663.

It can be written as a sum of positive squares in 3 ways, for example, as 3646952100 + 14945956 = 60390^2 + 3866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3661897994 and 3661898012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 703110 + ... + 708298.

Almost surely, 2^3661898056 is an apocalyptic number.

It is an amenable number.

3661898056 is a deficient number, since it is larger than the sum of its proper divisors (3609447914).

3661898056 is an frugal number, since it uses more digits than its factorization.

3661898056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401 (or 5208 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 3661898056 is about 60513.6187647045. The cubic root of 3661898056 is about 1541.3528978169.

The spelling of 3661898056 in words is "three billion, six hundred sixty-one million, eight hundred ninety-eight thousand, fifty-six".