55921767994368 has 1408 divisors, whose sum is σ = 186595218432000. Its totient is φ = 16469201387520.

The previous prime is 55921767994357. The next prime is 55921767994403. The reversal of 55921767994368 is 86349976712955.

55921767994368 is a `hidden beast` number, since 5 + 5 + 9 + 2 + 176 + 7 + 9 + 9 + 436 + 8 = 666.

55921767994368 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 59428020778 + ... + 59428021718.

Almost surely, 2^{55921767994368} is an apocalyptic number.

55921767994368 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55921767994368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93297609216000).

55921767994368 is an abundant number, since it is smaller than the sum of its proper divisors (130673450437632).

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

55921767994368 is a wasteful number, since it uses less digits than its factorization.

55921767994368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1124 counting only the distinct ones).

The product of its digits is 6172588800, while the sum is 81.

The spelling of 55921767994368 in words is "fifty-five trillion, nine hundred twenty-one billion, seven hundred sixty-seven million, nine hundred ninety-four thousand, three hundred sixty-eight".