61811044 has 9 divisors (see below), whose sum is σ = 108196851. Its totient is φ = 30897660.

The previous prime is 61811033. The next prime is 61811059. The reversal of 61811044 is 44011816.

The square root of 61811044 is 7862.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13759 + ... + 17689.

Almost surely, 2^61811044 is an apocalyptic number.

61811044 is the 7862-nd square number.

It is an amenable number.

61811044 is a deficient number, since it is larger than the sum of its proper divisors (46385807).

61811044 is an frugal number, since it uses more digits than its factorization.

61811044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866 (or 3933 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The cubic root of 61811044 is about 395.3866725762.

Multiplying 61811044 by its sum of digits (25), we get a square (1545276100 = 39310²).

It can be divided in two parts, 6181 and 1044, that added together give a square (7225 = 85²).

The spelling of 61811044 in words is "sixty-one million, eight hundred eleven thousand, forty-four".