55051720203720 has 32 divisors (see below), whose sum is σ = 165155160611520. Its totient is φ = 14680458720960.

The previous prime is 55051720203719. The next prime is 55051720203737. The reversal of 55051720203720 is 2730202715055.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229382167396 + ... + 229382167635.

It is an arithmetic number, because the mean of its divisors is an integer number (5161098769110).

Almost surely, 2^{55051720203720} is an apocalyptic number.

It is an amenable number.

55051720203720 is an abundant number, since it is smaller than the sum of its proper divisors (110103440407800).

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

55051720203720 is a wasteful number, since it uses less digits than its factorization.

55051720203720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458764335045 (or 458764335041 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 39.

Adding to 55051720203720 its reverse (2730202715055), we get a palindrome (57781922918775).

The spelling of 55051720203720 in words is "fifty-five trillion, fifty-one billion, seven hundred twenty million, two hundred three thousand, seven hundred twenty".