78618801 has 4 divisors (see below), whose sum is σ = 104825072. Its totient is φ = 52412532.

The previous prime is 78618781. The next prime is 78618809. The reversal of 78618801 is 10881687.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78618801 - 2⁹ = 78618289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78618801.

It is not an unprimeable number, because it can be changed into a prime (78618809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13103131 + ... + 13103136.

It is an arithmetic number, because the mean of its divisors is an integer number (26206268).

Almost surely, 2^78618801 is an apocalyptic number.

It is an amenable number.

78618801 is a deficient number, since it is larger than the sum of its proper divisors (26206271).

78618801 is a wasteful number, since it uses less digits than its factorization.

78618801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26206270.

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 78618801 is about 8866.7243669802. The cubic root of 78618801 is about 428.3927760300.

The spelling of 78618801 in words is "seventy-eight million, six hundred eighteen thousand, eight hundred one".