1601015665 has 8 divisors (see below), whose sum is σ = 1921445568. Its totient is φ = 1280661360.

The previous prime is 1601015629. The next prime is 1601015687. The reversal of 1601015665 is 5665101061.

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

It is not a de Polignac number, because 1601015665 - 2⁹ = 1601015153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51630 + ... + 76600.

It is an arithmetic number, because the mean of its divisors is an integer number (240180696).

Almost surely, 2^1601015665 is an apocalyptic number.

It is an amenable number.

1601015665 is a deficient number, since it is larger than the sum of its proper divisors (320429903).

1601015665 is a wasteful number, since it uses less digits than its factorization.

1601015665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37799.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1601015665 is about 40012.6937983435. The cubic root of 1601015665 is about 1169.8545281429.

The spelling of 1601015665 in words is "one billion, six hundred one million, fifteen thousand, six hundred sixty-five".