1601720049 has 8 divisors (see below), whose sum is σ = 2175921792. Its totient is φ = 1047665840.

The previous prime is 1601720039. The next prime is 1601720053. The reversal of 1601720049 is 9400271061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1601720049 - 2⁵ = 1601720017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1601719998 and 1601720025.

It is not an unprimeable number, because it can be changed into a prime (1601720009) 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 7 ways as a sum of consecutive naturals, for example, 5036697 + ... + 5037014.

It is an arithmetic number, because the mean of its divisors is an integer number (271990224).

Almost surely, 2^1601720049 is an apocalyptic number.

It is an amenable number.

1601720049 is a deficient number, since it is larger than the sum of its proper divisors (574201743).

1601720049 is a wasteful number, since it uses less digits than its factorization.

1601720049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10073767.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1601720049 is about 40021.4948371497. The cubic root of 1601720049 is about 1170.0260663343.

The spelling of 1601720049 in words is "one billion, six hundred one million, seven hundred twenty thousand, forty-nine".