78563841 has 32 divisors (see below), whose sum is σ = 113664000. Its totient is φ = 48117888.

The previous prime is 78563809. The next prime is 78563857. The reversal of 78563841 is 14836587.

It is not a de Polignac number, because 78563841 - 2⁵ = 78563809 is a prime.

It is a super-2 number, since 2×78563841² = 12344554225346562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78563793 and 78563802.

It is not an unprimeable number, because it can be changed into a prime (78563801) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 328600 + ... + 328838.

It is an arithmetic number, because the mean of its divisors is an integer number (3552000).

Almost surely, 2^78563841 is an apocalyptic number.

It is an amenable number.

78563841 is a deficient number, since it is larger than the sum of its proper divisors (35100159).

78563841 is a wasteful number, since it uses less digits than its factorization.

78563841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its digits is 161280, while the sum is 42.

The square root of 78563841 is about 8863.6245971950. The cubic root of 78563841 is about 428.2929273288.

The spelling of 78563841 in words is "seventy-eight million, five hundred sixty-three thousand, eight hundred forty-one".