1601326965 has 32 divisors (see below), whose sum is σ = 2977781760. Its totient is φ = 719625024.

The previous prime is 1601326963. The next prime is 1601326997. The reversal of 1601326965 is 5696231061.

It is not a de Polignac number, because 1601326965 - 2¹ = 1601326963 is a prime.

It is a super-2 number, since 2×1601326965² = 5128496097672222450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601326963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123049 + ... + 135438.

It is an arithmetic number, because the mean of its divisors is an integer number (93055680).

Almost surely, 2^1601326965 is an apocalyptic number.

1601326965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1601326965 is a deficient number, since it is larger than the sum of its proper divisors (1376454795).

1601326965 is a wasteful number, since it uses less digits than its factorization.

1601326965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258561.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 1601326965 is about 40016.5836247924. The cubic root of 1601326965 is about 1169.9303450387.

The spelling of 1601326965 in words is "one billion, six hundred one million, three hundred twenty-six thousand, nine hundred sixty-five".