78479969755 has 16 divisors (see below), whose sum is σ = 102753372384. Its totient is φ = 57067476480.

The previous prime is 78479969747. The next prime is 78479969759. The reversal of 78479969755 is 55796997487.

It is a happy number.

It is not a de Polignac number, because 78479969755 - 2³ = 78479969747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78479969759) 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 15 ways as a sum of consecutive naturals, for example, 257539 + ... + 472531.

It is an arithmetic number, because the mean of its divisors is an integer number (6422085774).

Almost surely, 2^78479969755 is an apocalyptic number.

78479969755 is a deficient number, since it is larger than the sum of its proper divisors (24273402629).

78479969755 is a wasteful number, since it uses less digits than its factorization.

78479969755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221646.

The product of its digits is 1200225600, while the sum is 76.

The spelling of 78479969755 in words is "seventy-eight billion, four hundred seventy-nine million, nine hundred sixty-nine thousand, seven hundred fifty-five".