78005005555 has 16 divisors (see below), whose sum is σ = 94776431904. Its totient is φ = 61626516480.

The previous prime is 78005005549. The next prime is 78005005567. The reversal of 78005005555 is 55550050087.

It is not a de Polignac number, because 78005005555 - 2³⁵ = 43645267187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49144 + ... + 398026.

It is an arithmetic number, because the mean of its divisors is an integer number (5923526994).

Almost surely, 2^78005005555 is an apocalyptic number.

78005005555 is a deficient number, since it is larger than the sum of its proper divisors (16771426349).

78005005555 is a wasteful number, since it uses less digits than its factorization.

78005005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349446.

The product of its (nonzero) digits is 175000, while the sum is 40.

The spelling of 78005005555 in words is "seventy-eight billion, five million, five thousand, five hundred fifty-five".