78530641 has 4 divisors (see below), whose sum is σ = 89749312. Its totient is φ = 67311972.

The previous prime is 78530623. The next prime is 78530653. The reversal of 78530641 is 14603587.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14603587 = 2213 ⋅6599.

It is not a de Polignac number, because 78530641 - 2⁵ = 78530609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78530597 and 78530606.

It is not an unprimeable number, because it can be changed into a prime (78530681) 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 3 ways as a sum of consecutive naturals, for example, 5609325 + ... + 5609338.

It is an arithmetic number, because the mean of its divisors is an integer number (22437328).

Almost surely, 2^78530641 is an apocalyptic number.

It is an amenable number.

78530641 is a deficient number, since it is larger than the sum of its proper divisors (11218671).

78530641 is a wasteful number, since it uses less digits than its factorization.

78530641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11218670.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78530641 is about 8861.7515762969. The cubic root of 78530641 is about 428.2325885927.

The spelling of 78530641 in words is "seventy-eight million, five hundred thirty thousand, six hundred forty-one".