1965056779 has 32 divisors (see below), whose sum is σ = 2430881280. Its totient is φ = 1551094272.

The previous prime is 1965056777. The next prime is 1965056783. The reversal of 1965056779 is 9776505691.

It is a happy number.

It is not a de Polignac number, because 1965056779 - 2¹ = 1965056777 is a prime.

It is a super-2 number, since 2×1965056779² = 7722896289387709682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1965056777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 795304 + ... + 797770.

It is an arithmetic number, because the mean of its divisors is an integer number (75965040).

Almost surely, 2^1965056779 is an apocalyptic number.

1965056779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1965056779 is a deficient number, since it is larger than the sum of its proper divisors (465824501).

1965056779 is a wasteful number, since it uses less digits than its factorization.

1965056779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659.

The product of its (nonzero) digits is 3572100, while the sum is 55.

The square root of 1965056779 is about 44328.9609510532. The cubic root of 1965056779 is about 1252.5402802705.

The spelling of 1965056779 in words is "one billion, nine hundred sixty-five million, fifty-six thousand, seven hundred seventy-nine".