61286943844 has 27 divisors (see below), whose sum is σ = 124769763027. Its totient is φ = 26264347704.

The previous prime is 61286943829. The next prime is 61286943853. The reversal of 61286943844 is 44834968216.

The square root of 61286943844 is 247562.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3457027 + ... + 3474709.

Almost surely, 2^61286943844 is an apocalyptic number.

61286943844 is the 247562-nd square number.

It is an amenable number.

61286943844 is an abundant number, since it is smaller than the sum of its proper divisors (63482819183).

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

61286943844 is an frugal number, since it uses more digits than its factorization.

61286943844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35384 (or 17692 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 55.

The spelling of 61286943844 in words is "sixty-one billion, two hundred eighty-six million, nine hundred forty-three thousand, eight hundred forty-four".