78634461 has 8 divisors (see below), whose sum is σ = 105204960. Its totient is φ = 52243472.

The previous prime is 78634441. The next prime is 78634489. The reversal of 78634461 is 16443687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78634461 - 2¹³ = 78626269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78634421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43851 + ... + 45608.

It is an arithmetic number, because the mean of its divisors is an integer number (13150620).

Almost surely, 2^78634461 is an apocalyptic number.

It is an amenable number.

78634461 is a deficient number, since it is larger than the sum of its proper divisors (26570499).

78634461 is a wasteful number, since it uses less digits than its factorization.

78634461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89755.

The product of its digits is 96768, while the sum is 39.

The square root of 78634461 is about 8867.6073999698. The cubic root of 78634461 is about 428.4212178506.

The spelling of 78634461 in words is "seventy-eight million, six hundred thirty-four thousand, four hundred sixty-one".