78556969405 has 8 divisors (see below), whose sum is σ = 94393891584. Its totient is φ = 62761890000.

The previous prime is 78556969339. The next prime is 78556969409. The reversal of 78556969405 is 50496965587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78556969405 - 2¹⁷ = 78556838333 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 (78556969409) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10456561 + ... + 10464070.

It is an arithmetic number, because the mean of its divisors is an integer number (11799236448).

Almost surely, 2^78556969405 is an apocalyptic number.

It is an amenable number.

78556969405 is a deficient number, since it is larger than the sum of its proper divisors (15836922179).

78556969405 is a wasteful number, since it uses less digits than its factorization.

78556969405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20921387.

The product of its (nonzero) digits is 81648000, while the sum is 64.

The spelling of 78556969405 in words is "seventy-eight billion, five hundred fifty-six million, nine hundred sixty-nine thousand, four hundred five".