78852155 has 4 divisors (see below), whose sum is σ = 94622592. Its totient is φ = 63081720.

The previous prime is 78852149. The next prime is 78852161. The reversal of 78852155 is 55125887.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78852149) and next prime (78852161).

It is not a de Polignac number, because 78852155 - 2¹⁰ = 78851131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7885211 + ... + 7885220.

It is an arithmetic number, because the mean of its divisors is an integer number (23655648).

Almost surely, 2^78852155 is an apocalyptic number.

78852155 is a deficient number, since it is larger than the sum of its proper divisors (15770437).

78852155 is a wasteful number, since it uses less digits than its factorization.

78852155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15770436.

The product of its digits is 112000, while the sum is 41.

The square root of 78852155 is about 8879.8735914426. The cubic root of 78852155 is about 428.8162049590.

The spelling of 78852155 in words is "seventy-eight million, eight hundred fifty-two thousand, one hundred fifty-five".