68649456 has 20 divisors (see below), whose sum is σ = 177344552. Its totient is φ = 22883136.

The previous prime is 68649443. The next prime is 68649463. The reversal of 68649456 is 65494686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1430197 = 68649456 / (6 + 8 + 6 + 4 + 9 + 4 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715051 + ... + 715146.

Almost surely, 2^68649456 is an apocalyptic number.

It is an amenable number.

68649456 is an abundant number, since it is smaller than the sum of its proper divisors (108695096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68649456 is a wasteful number, since it uses less digits than its factorization.

68649456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430208 (or 1430202 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 68649456 is about 8285.4967262078. The cubic root of 68649456 is about 409.4608340190.

The spelling of 68649456 in words is "sixty-eight million, six hundred forty-nine thousand, four hundred fifty-six".