83378686909 has 4 divisors (see below), whose sum is σ = 95289927904. Its totient is φ = 71467445916.

The previous prime is 83378686907. The next prime is 83378686921. The reversal of 83378686909 is 90968687338.

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.

It is a cyclic number.

It is not a de Polignac number, because 83378686909 - 2¹ = 83378686907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83378686901) 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, 5955620487 + ... + 5955620500.

It is an arithmetic number, because the mean of its divisors is an integer number (23822481976).

Almost surely, 2^83378686909 is an apocalyptic number.

It is an amenable number.

83378686909 is a deficient number, since it is larger than the sum of its proper divisors (11911240995).

83378686909 is a wasteful number, since it uses less digits than its factorization.

83378686909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911240994.

The product of its (nonzero) digits is 94058496, while the sum is 67.

The spelling of 83378686909 in words is "eighty-three billion, three hundred seventy-eight million, six hundred eighty-six thousand, nine hundred nine".