3699663749401 has 9 divisors (see below), whose sum is σ = 3705016750911. Its totient is φ = 3694318479072.

The previous prime is 3699663749381. The next prime is 3699663749447. The reversal of 3699663749401 is 1049473669963.

The square root of 3699663749401 is 1923451.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3688262635225 + 11401114176 = 1920485^2 + 106776^2 .

It is not a de Polignac number, because 3699663749401 - 2⁹ = 3699663748889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3699663749491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2494715206 + ... + 2494716688.

It is an arithmetic number, because the mean of its divisors is an integer number (411668527879).

Almost surely, 2^{3699663749401} is an apocalyptic number.

3699663749401 is the 1923451-st square number.

3699663749401 is the 961726-th centered octagonal number.

It is an amenable number.

3699663749401 is a deficient number, since it is larger than the sum of its proper divisors (5353001510).

3699663749401 is an frugal number, since it uses more digits than its factorization.

3699663749401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 2780 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 67.

The spelling of 3699663749401 in words is "three trillion, six hundred ninety-nine billion, six hundred sixty-three million, seven hundred forty-nine thousand, four hundred one".