78508461 has 16 divisors (see below), whose sum is σ = 108738560. Its totient is φ = 50330160.

The previous prime is 78508459. The next prime is 78508483. The reversal of 78508461 is 16480587.

It is not a de Polignac number, because 78508461 - 2¹ = 78508459 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is the 8861-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78508421) by changing a digit.

It is a nontrivial repunit in base 8860.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12570 + ... + 17748.

It is an arithmetic number, because the mean of its divisors is an integer number (6796160).

Almost surely, 2^78508461 is an apocalyptic number.

It is an amenable number.

78508461 is a deficient number, since it is larger than the sum of its proper divisors (30230099).

78508461 is a wasteful number, since it uses less digits than its factorization.

78508461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 78508461 is about 8860.5000423227. The cubic root of 78508461 is about 428.1922684788.

The spelling of 78508461 in words is "seventy-eight million, five hundred eight thousand, four hundred sixty-one".