61881943032 has 512 divisors, whose sum is σ = 226195200000. Its totient is φ = 15210602496.

The previous prime is 61881943021. The next prime is 61881943033. The reversal of 61881943032 is 23034918816.

61881943032 is a `hidden beast` number, since 6 + 188 + 1 + 9 + 430 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61881943033) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 36421719 + ... + 36423417.

It is an arithmetic number, because the mean of its divisors is an integer number (441787500).

Almost surely, 2^61881943032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61881943032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113097600000).

61881943032 is an abundant number, since it is smaller than the sum of its proper divisors (164313256968).

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

61881943032 is a wasteful number, since it uses less digits than its factorization.

61881943032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 61881943032 in words is "sixty-one billion, eight hundred eighty-one million, nine hundred forty-three thousand, thirty-two".