1965326617 has 4 divisors (see below), whose sum is σ = 2068764880. Its totient is φ = 1861888356.

The previous prime is 1965326557. The next prime is 1965326621. The reversal of 1965326617 is 7166235691.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7166235691 = 521 ⋅13754771.

It is not a de Polignac number, because 1965326617 - 2¹⁵ = 1965293849 is a prime.

It is a super-2 number, since 2×1965326617² = 7725017422977329378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965326017) 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, 51719103 + ... + 51719140.

It is an arithmetic number, because the mean of its divisors is an integer number (517191220).

Almost surely, 2^1965326617 is an apocalyptic number.

It is an amenable number.

1965326617 is a deficient number, since it is larger than the sum of its proper divisors (103438263).

1965326617 is a wasteful number, since it uses less digits than its factorization.

1965326617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103438262.

The product of its digits is 408240, while the sum is 46.

The square root of 1965326617 is about 44332.0044324639. The cubic root of 1965326617 is about 1252.5976098260.

The spelling of 1965326617 in words is "one billion, nine hundred sixty-five million, three hundred twenty-six thousand, six hundred seventeen".