68249816 has 8 divisors (see below), whose sum is σ = 127968420. Its totient is φ = 34124904.

The previous prime is 68249813. The next prime is 68249833. The reversal of 68249816 is 61894286.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68249813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4265606 + ... + 4265621.

Almost surely, 2^68249816 is an apocalyptic number.

It is an amenable number.

68249816 is a deficient number, since it is larger than the sum of its proper divisors (59718604).

68249816 is a wasteful number, since it uses less digits than its factorization.

68249816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531233 (or 8531229 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 68249816 is about 8261.3446847350. The cubic root of 68249816 is about 408.6647340281.

The spelling of 68249816 in words is "sixty-eight million, two hundred forty-nine thousand, eight hundred sixteen".