61068144 has 20 divisors (see below), whose sum is σ = 157759496. Its totient is φ = 20356032.

The previous prime is 61068143. The next prime is 61068149. The reversal of 61068144 is 44186016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61068143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636079 + ... + 636174.

Almost surely, 2^61068144 is an apocalyptic number.

It is an amenable number.

61068144 is an abundant number, since it is smaller than the sum of its proper divisors (96691352).

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

61068144 is a wasteful number, since it uses less digits than its factorization.

61068144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272264 (or 1272258 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 61068144 is about 7814.6109308142. The cubic root of 61068144 is about 393.7962477298.

The spelling of 61068144 in words is "sixty-one million, sixty-eight thousand, one hundred forty-four".