78554648 has 8 divisors (see below), whose sum is σ = 147289980. Its totient is φ = 39277320.

The previous prime is 78554633. The next prime is 78554659. The reversal of 78554648 is 84645587.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4909658 + ... + 4909673.

Almost surely, 2^78554648 is an apocalyptic number.

It is an amenable number.

78554648 is a deficient number, since it is larger than the sum of its proper divisors (68735332).

78554648 is a wasteful number, since it uses less digits than its factorization.

78554648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9819337 (or 9819333 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 47.

The square root of 78554648 is about 8863.1060018483. The cubic root of 78554648 is about 428.2762213803.

The spelling of 78554648 in words is "seventy-eight million, five hundred fifty-four thousand, six hundred forty-eight".