3601821399 has 24 divisors (see below), whose sum is σ = 5589223920. Its totient is φ = 2054511360.

The previous prime is 3601821383. The next prime is 3601821401. The reversal of 3601821399 is 9931281063.

It is not a de Polignac number, because 3601821399 - 2⁴ = 3601821383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3601821399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3601821299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 285664 + ... + 298005.

It is an arithmetic number, because the mean of its divisors is an integer number (232884330).

Almost surely, 2^3601821399 is an apocalyptic number.

3601821399 is a deficient number, since it is larger than the sum of its proper divisors (1987402521).

3601821399 is a wasteful number, since it uses less digits than its factorization.

3601821399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583711 (or 583700 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 3601821399 is about 60015.1764056393. The cubic root of 3601821399 is about 1532.8772943998.

The spelling of 3601821399 in words is "three billion, six hundred one million, eight hundred twenty-one thousand, three hundred ninety-nine".