78325505 has 16 divisors (see below), whose sum is σ = 99550080. Its totient is φ = 58995072.

The previous prime is 78325483. The next prime is 78325517. The reversal of 78325505 is 50552387.

It is a cyclic number.

It is not a de Polignac number, because 78325505 - 2⁶ = 78325441 is a prime.

It is a super-2 number, since 2×78325505² = 12269769467010050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13397 + ... + 18333.

It is an arithmetic number, because the mean of its divisors is an integer number (6221880).

Almost surely, 2^78325505 is an apocalyptic number.

It is an amenable number.

78325505 is a deficient number, since it is larger than the sum of its proper divisors (21224575).

78325505 is a wasteful number, since it uses less digits than its factorization.

78325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 78325505 is about 8850.1697723829. The cubic root of 78325505 is about 427.8593902245.

The spelling of 78325505 in words is "seventy-eight million, three hundred twenty-five thousand, five hundred five".