78553255 has 32 divisors (see below), whose sum is σ = 105753600. Its totient is φ = 55536000.

The previous prime is 78553231. The next prime is 78553271. The reversal of 78553255 is 55235587.

It is a happy number.

It is not a de Polignac number, because 78553255 - 2¹³ = 78545063 is a prime.

It is a super-2 number, since 2×78553255² = 12341227742190050, which contains 22 as substring.

Its product of digits (210000) is a multiple of the sum of its prime divisors (375).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 438756 + ... + 438934.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^78553255 is an apocalyptic number.

78553255 is a deficient number, since it is larger than the sum of its proper divisors (27200345).

78553255 is a wasteful number, since it uses less digits than its factorization.

78553255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375.

The product of its digits is 210000, while the sum is 40.

The square root of 78553255 is about 8863.0274173106. The cubic root of 78553255 is about 428.2736898420.

It can be divided in two parts, 785532 and 55, that added together give a palindrome (785587).

The spelling of 78553255 in words is "seventy-eight million, five hundred fifty-three thousand, two hundred fifty-five".