78551841 has 16 divisors (see below), whose sum is σ = 108250560. Its totient is φ = 50635200.

The previous prime is 78551813. The next prime is 78551843. The reversal of 78551841 is 14815587.

It is not a de Polignac number, because 78551841 - 2¹³ = 78543649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78551841.

It is not an unprimeable number, because it can be changed into a prime (78551843) 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 15 ways as a sum of consecutive naturals, for example, 10015 + ... + 16043.

It is an arithmetic number, because the mean of its divisors is an integer number (6765660).

Almost surely, 2^78551841 is an apocalyptic number.

It is an amenable number.

78551841 is a deficient number, since it is larger than the sum of its proper divisors (29698719).

78551841 is a wasteful number, since it uses less digits than its factorization.

78551841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176.

The product of its digits is 44800, while the sum is 39.

The square root of 78551841 is about 8862.9476473688. The cubic root of 78551841 is about 428.2711201091.

The spelling of 78551841 in words is "seventy-eight million, five hundred fifty-one thousand, eight hundred forty-one".