54991642608 has 320 divisors, whose sum is σ = 183394928640. Its totient is φ = 15645623040.

The previous prime is 54991642549. The next prime is 54991642633. The reversal of 54991642608 is 80624619945.

54991642608 is a `hidden beast` number, since 549 + 91 + 6 + 4 + 2 + 6 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112918941 + ... + 112919427.

It is an arithmetic number, because the mean of its divisors is an integer number (573109152).

Almost surely, 2^54991642608 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 54991642608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91697464320).

54991642608 is an abundant number, since it is smaller than the sum of its proper divisors (128403286032).

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

54991642608 is an equidigital number, since it uses as much as digits as its factorization.

54991642608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 54991642608 in words is "fifty-four billion, nine hundred ninety-one million, six hundred forty-two thousand, six hundred eight".