34278778989 has 64 divisors (see below), whose sum is σ = 63435796480. Its totient is φ = 17811161280.

The previous prime is 34278778979. The next prime is 34278778993. The reversal of 34278778989 is 98987787243.

It is not a de Polignac number, because 34278778989 - 2⁷ = 34278778861 is a prime.

It is a super-3 number, since 3×34278778989³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34278778909) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60504 + ... + 268734.

It is an arithmetic number, because the mean of its divisors is an integer number (991184320).

Almost surely, 2^34278778989 is an apocalyptic number.

34278778989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

34278778989 is a deficient number, since it is larger than the sum of its proper divisors (29157017491).

34278778989 is a wasteful number, since it uses less digits than its factorization.

34278778989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208327 (or 208321 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 72.

The spelling of 34278778989 in words is "thirty-four billion, two hundred seventy-eight million, seven hundred seventy-eight thousand, nine hundred eighty-nine".