1601650001 has 8 divisors (see below), whose sum is σ = 1838667264. Its totient is φ = 1366685280.

The previous prime is 1601649971. The next prime is 1601650031. The reversal of 1601650001 is 1000561061.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1601649971) and next prime (1601650031).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601650001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1601650031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511460 + ... + 514581.

It is an arithmetic number, because the mean of its divisors is an integer number (229833408).

Almost surely, 2^1601650001 is an apocalyptic number.

It is an amenable number.

1601650001 is a deficient number, since it is larger than the sum of its proper divisors (237017263).

1601650001 is a wasteful number, since it uses less digits than its factorization.

1601650001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026271.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1601650001 is about 40020.6196978508. The cubic root of 1601650001 is about 1170.0090098413.

The spelling of 1601650001 in words is "one billion, six hundred one million, six hundred fifty thousand, one".