12277921965 has 32 divisors (see below), whose sum is σ = 20053028736. Its totient is φ = 6412573440.

The previous prime is 12277921871. The next prime is 12277921979. The reversal of 12277921965 is 56912977221.

It is not a de Polignac number, because 12277921965 - 2¹⁴ = 12277905581 is a prime.

It is a super-2 number, since 2×12277921965² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415822 + ... + 444368.

It is an arithmetic number, because the mean of its divisors is an integer number (626657148).

Almost surely, 2^12277921965 is an apocalyptic number.

12277921965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12277921965 is a deficient number, since it is larger than the sum of its proper divisors (7775106771).

12277921965 is a wasteful number, since it uses less digits than its factorization.

12277921965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29149.

The product of its digits is 952560, while the sum is 51.

The spelling of 12277921965 in words is "twelve billion, two hundred seventy-seven million, nine hundred twenty-one thousand, nine hundred sixty-five".