61328440584 has 48 divisors (see below), whose sum is σ = 170149035420. Its totient is φ = 19944207360.

The previous prime is 61328440567. The next prime is 61328440609. The reversal of 61328440584 is 48504482316.

61328440584 is a `hidden beast` number, since 6 + 1 + 3 + 28 + 4 + 40 + 584 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50930559684 + 10397880900 = 225678^2 + 101970^2 .

It is a super-2 number, since 2×61328440584² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10384657 + ... + 10390560.

Almost surely, 2^61328440584 is an apocalyptic number.

It is an amenable number.

61328440584 is an abundant number, since it is smaller than the sum of its proper divisors (108820594836).

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

61328440584 is a wasteful number, since it uses less digits than its factorization.

61328440584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20775270 (or 20775263 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 61328440584 in words is "sixty-one billion, three hundred twenty-eight million, four hundred forty thousand, five hundred eighty-four".