78535755 has 12 divisors (see below), whose sum is σ = 136128720. Its totient is φ = 41885712.

The previous prime is 78535729. The next prime is 78535757. The reversal of 78535755 is 55753587.

78535755 is a `hidden beast` number, since 78 + 5 + 3 + 575 + 5 = 666.

It is not a de Polignac number, because 78535755 - 2¹² = 78531659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1745239 = 78535755 / (7 + 8 + 5 + 3 + 5 + 7 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 78535755.

It is not an unprimeable number, because it can be changed into a prime (78535757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872575 + ... + 872664.

It is an arithmetic number, because the mean of its divisors is an integer number (11344060).

Almost surely, 2^78535755 is an apocalyptic number.

78535755 is a deficient number, since it is larger than the sum of its proper divisors (57592965).

78535755 is a wasteful number, since it uses less digits than its factorization.

78535755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745250 (or 1745247 counting only the distinct ones).

The product of its digits is 735000, while the sum is 45.

The square root of 78535755 is about 8862.0401150074. The cubic root of 78535755 is about 428.2418840468.

The spelling of 78535755 in words is "seventy-eight million, five hundred thirty-five thousand, seven hundred fifty-five".