78381055 has 8 divisors (see below), whose sum is σ = 97300800. Its totient is φ = 60542496.

The previous prime is 78381047. The next prime is 78381077. The reversal of 78381055 is 55018387.

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 78381055 - 2³ = 78381047 is a prime.

It is a super-2 number, since 2×78381055² = 12287179565826050, which contains 22 as substring.

It is a plaindrome in base 16.

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, 270135 + ... + 270424.

It is an arithmetic number, because the mean of its divisors is an integer number (12162600).

Almost surely, 2^78381055 is an apocalyptic number.

78381055 is a deficient number, since it is larger than the sum of its proper divisors (18919745).

78381055 is a wasteful number, since it uses less digits than its factorization.

78381055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540593.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 78381055 is about 8853.3075740087. The cubic root of 78381055 is about 427.9605151073.

The spelling of 78381055 in words is "seventy-eight million, three hundred eighty-one thousand, fifty-five".