78758641 has 16 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 71285760.

The previous prime is 78758639. The next prime is 78758653. The reversal of 78758641 is 14685787.

It is not a de Polignac number, because 78758641 - 2¹ = 78758639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78758591 and 78758600.

It is not an unprimeable number, because it can be changed into a prime (78758611) 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, 175185 + ... + 175633.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^78758641 is an apocalyptic number.

It is an amenable number.

78758641 is a deficient number, since it is larger than the sum of its proper divisors (7727759).

78758641 is a wasteful number, since it uses less digits than its factorization.

78758641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its digits is 376320, while the sum is 46.

The square root of 78758641 is about 8874.6065264889. The cubic root of 78758641 is about 428.6466210026.

The spelling of 78758641 in words is "seventy-eight million, seven hundred fifty-eight thousand, six hundred forty-one".