78646473 has 12 divisors (see below), whose sum is σ = 117265408. Its totient is φ = 50739480.

The previous prime is 78646457. The next prime is 78646483. The reversal of 78646473 is 37464687.

It is not a de Polignac number, because 78646473 - 2⁴ = 78646457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78646433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140665 + ... + 141222.

Almost surely, 2^78646473 is an apocalyptic number.

It is an amenable number.

78646473 is a deficient number, since it is larger than the sum of its proper divisors (38618935).

78646473 is a wasteful number, since it uses less digits than its factorization.

78646473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281924 (or 281921 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 78646473 is about 8868.2846706677. The cubic root of 78646473 is about 428.4430315846.

The spelling of 78646473 in words is "seventy-eight million, six hundred forty-six thousand, four hundred seventy-three".