61343644 has 6 divisors (see below), whose sum is σ = 107351384. Its totient is φ = 30671820.

The previous prime is 61343641. The next prime is 61343677. The reversal of 61343644 is 44634316.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61343641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7667952 + ... + 7667959.

Almost surely, 2^61343644 is an apocalyptic number.

It is an amenable number.

61343644 is a deficient number, since it is larger than the sum of its proper divisors (46007740).

61343644 is a wasteful number, since it uses less digits than its factorization.

61343644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15335915 (or 15335913 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 61343644 is about 7832.2183319925. The cubic root of 61343644 is about 394.3875441621.

The spelling of 61343644 in words is "sixty-one million, three hundred forty-three thousand, six hundred forty-four".