78147055 has 8 divisors (see below), whose sum is σ = 107173152. Its totient is φ = 53586528.

The previous prime is 78147053. The next prime is 78147059. The reversal of 78147055 is 55074187.

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 78147055 - 2¹ = 78147053 is a prime.

It is a super-3 number, since 3×78147055³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78147053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116352 + ... + 1116421.

It is an arithmetic number, because the mean of its divisors is an integer number (13396644).

Almost surely, 2^78147055 is an apocalyptic number.

78147055 is a deficient number, since it is larger than the sum of its proper divisors (29026097).

78147055 is a wasteful number, since it uses less digits than its factorization.

78147055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232785.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 78147055 is about 8840.0822959970. The cubic root of 78147055 is about 427.5342106384.

The spelling of 78147055 in words is "seventy-eight million, one hundred forty-seven thousand, fifty-five".