78055745 has 8 divisors (see below), whose sum is σ = 93721320. Its totient is φ = 62408320.

The previous prime is 78055739. The next prime is 78055753. The reversal of 78055745 is 54755087.

It can be written as a sum of positive squares in 4 ways, for example, as 29669809 + 48385936 = 5447^2 + 6956^2 .

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

It is not a de Polignac number, because 78055745 - 2¹⁰ = 78054721 is a prime.

It is a Curzon 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, 8165 + ... + 14925.

It is an arithmetic number, because the mean of its divisors is an integer number (11715165).

Almost surely, 2^78055745 is an apocalyptic number.

It is an amenable number.

78055745 is a deficient number, since it is larger than the sum of its proper divisors (15665575).

78055745 is a wasteful number, since it uses less digits than its factorization.

78055745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 78055745 is about 8834.9162418214. The cubic root of 78055745 is about 427.3676299818.

The spelling of 78055745 in words is "seventy-eight million, fifty-five thousand, seven hundred forty-five".