61043664 has 40 divisors (see below), whose sum is σ = 172033632. Its totient is φ = 18497920.

The previous prime is 61043627. The next prime is 61043669. The reversal of 61043664 is 46634016.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61043669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57279 + ... + 58334.

Almost surely, 2^61043664 is an apocalyptic number.

It is an amenable number.

61043664 is an abundant number, since it is smaller than the sum of its proper divisors (110989968).

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

61043664 is a wasteful number, since it uses less digits than its factorization.

61043664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115635 (or 115629 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 61043664 is about 7813.0444770269. The cubic root of 61043664 is about 393.7436211615.

The spelling of 61043664 in words is "sixty-one million, forty-three thousand, six hundred sixty-four".