61443502884 has 135 divisors (see below), whose sum is σ = 164677764097. Its totient is φ = 19976983776.

The previous prime is 61443502867. The next prime is 61443502907. The reversal of 61443502884 is 48820534416.

The square root of 61443502884 is 247878.

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

61443502884 is a `hidden beast` number, since 6 + 14 + 4 + 350 + 288 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58134032100 + 3309470784 = 241110^2 + 57528^2 .

It is a super-2 number, since 2×61443502884² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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 44 ways as a sum of consecutive naturals, for example, 209704642 + ... + 209704934.

Almost surely, 2^61443502884 is an apocalyptic number.

61443502884 is the 247878-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61443502884

61443502884 is an abundant number, since it is smaller than the sum of its proper divisors (103234261213).

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

61443502884 is an equidigital number, since it uses as much as digits as its factorization.

61443502884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 345 counting only the distinct ones).

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

The spelling of 61443502884 in words is "sixty-one billion, four hundred forty-three million, five hundred two thousand, eight hundred eighty-four".