55643936961888 has 768 divisors, whose sum is σ = 203695865856000. Its totient is φ = 14549654937600.

The previous prime is 55643936961887. The next prime is 55643936961901. The reversal of 55643936961888 is 88816963934655.

55643936961888 is a `hidden beast` number, since 5 + 5 + 6 + 439 + 3 + 6 + 96 + 18 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55643936961887) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 94871193 + ... + 95455911.

It is an arithmetic number, because the mean of its divisors is an integer number (265228992000).

Almost surely, 2^{55643936961888} 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 55643936961888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101847932928000).

55643936961888 is an abundant number, since it is smaller than the sum of its proper divisors (148051928894112).

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

55643936961888 is a wasteful number, since it uses less digits than its factorization.

55643936961888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584816 (or 584802 counting only the distinct ones).

The product of its digits is 8062156800, while the sum is 81.

The spelling of 55643936961888 in words is "fifty-five trillion, six hundred forty-three billion, nine hundred thirty-six million, nine hundred sixty-one thousand, eight hundred eighty-eight".