1601365849 has 4 divisors (see below), whose sum is σ = 1601501200. Its totient is φ = 1601230500.

The previous prime is 1601365837. The next prime is 1601365907. The reversal of 1601365849 is 9485631061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1601365849 - 2¹¹ = 1601363801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601365349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48027 + ... + 74224.

It is an arithmetic number, because the mean of its divisors is an integer number (400375300).

Almost surely, 2^1601365849 is an apocalyptic number.

It is an amenable number.

1601365849 is a deficient number, since it is larger than the sum of its proper divisors (135351).

1601365849 is a wasteful number, since it uses less digits than its factorization.

1601365849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135350.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1601365849 is about 40017.0694704147. The cubic root of 1601365849 is about 1169.9398145192.

The spelling of 1601365849 in words is "one billion, six hundred one million, three hundred sixty-five thousand, eight hundred forty-nine".