55445341644 has 864 divisors, whose sum is σ = 201589355520. Its totient is φ = 12871457280.

The previous prime is 55445341619. The next prime is 55445341691. The reversal of 55445341644 is 44614354455.

55445341644 is a `hidden beast` number, since 5 + 54 + 4 + 534 + 1 + 64 + 4 = 666.

55445341644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55445341644.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 759525192 + ... + 759525264.

Almost surely, 2^55445341644 is an apocalyptic number.

55445341644 is a gapful number since it is divisible by the number (54) 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 55445341644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100794677760).

55445341644 is an abundant number, since it is smaller than the sum of its proper divisors (146144013876).

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

55445341644 is a wasteful number, since it uses less digits than its factorization.

55445341644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 138 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 45.

The spelling of 55445341644 in words is "fifty-five billion, four hundred forty-five million, three hundred forty-one thousand, six hundred forty-four".