78687055 has 8 divisors (see below), whose sum is σ = 94475952. Its totient is φ = 62915328.

The previous prime is 78687047. The next prime is 78687097. The reversal of 78687055 is 55078687.

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

It is a cyclic number.

It is not a de Polignac number, because 78687055 - 2³ = 78687047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78686996 and 78687014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10324 + ... + 16246.

It is an arithmetic number, because the mean of its divisors is an integer number (11809494).

Almost surely, 2^78687055 is an apocalyptic number.

78687055 is a deficient number, since it is larger than the sum of its proper divisors (15788897).

78687055 is a wasteful number, since it uses less digits than its factorization.

78687055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8585.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 78687055 is about 8870.5724167046. The cubic root of 78687055 is about 428.5167118769.

The spelling of 78687055 in words is "seventy-eight million, six hundred eighty-seven thousand, fifty-five".