1964396965 has 16 divisors (see below), whose sum is σ = 2372848128. Its totient is φ = 1561167936.

The previous prime is 1964396963. The next prime is 1964396977. The reversal of 1964396965 is 5696934691.

It is a cyclic number.

It is not a de Polignac number, because 1964396965 - 2¹ = 1964396963 is a prime.

It is a super-2 number, since 2×1964396965² = 7717710872202422450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964396963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619474 + ... + 622636.

It is an arithmetic number, because the mean of its divisors is an integer number (148303008).

Almost surely, 2^1964396965 is an apocalyptic number.

It is an amenable number.

1964396965 is a deficient number, since it is larger than the sum of its proper divisors (408451163).

1964396965 is a wasteful number, since it uses less digits than its factorization.

1964396965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948.

The product of its digits is 9447840, while the sum is 58.

The square root of 1964396965 is about 44321.5180809503. The cubic root of 1964396965 is about 1252.4000746307.

The spelling of 1964396965 in words is "one billion, nine hundred sixty-four million, three hundred ninety-six thousand, nine hundred sixty-five".