61244445660 has 24 divisors (see below), whose sum is σ = 171484448016. Its totient is φ = 16331852160.

The previous prime is 61244445653. The next prime is 61244445709. The reversal of 61244445660 is 6654444216.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 510370321 + ... + 510370440.

It is an arithmetic number, because the mean of its divisors is an integer number (7145185334).

Almost surely, 2^61244445660 is an apocalyptic number.

61244445660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61244445660 is an abundant number, since it is smaller than the sum of its proper divisors (110240002356).

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

61244445660 is a wasteful number, since it uses less digits than its factorization.

61244445660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020740773 (or 1020740771 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

Adding to 61244445660 its reverse (6654444216), we get a palindrome (67898889876).

The spelling of 61244445660 in words is "sixty-one billion, two hundred forty-four million, four hundred forty-five thousand, six hundred sixty".