61844091472 has 20 divisors (see below), whose sum is σ = 119840002740. Its totient is φ = 30917639168.

The previous prime is 61844091457. The next prime is 61844091473. The reversal of 61844091472 is 27419044816.

It can be written as a sum of positive squares in 2 ways, for example, as 26993175616 + 34850915856 = 164296^2 + 186684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61844091473) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 158113 + ... + 385600.

It is an arithmetic number, because the mean of its divisors is an integer number (5992000137).

Almost surely, 2^61844091472 is an apocalyptic number.

It is an amenable number.

61844091472 is a deficient number, since it is larger than the sum of its proper divisors (57995911268).

61844091472 is a wasteful number, since it uses less digits than its factorization.

61844091472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550830 (or 550824 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 61844091472 in words is "sixty-one billion, eight hundred forty-four million, ninety-one thousand, four hundred seventy-two".