55721540450 has 24 divisors (see below), whose sum is σ = 103716278400. Its totient is φ = 22272656400.

The previous prime is 55721540393. The next prime is 55721540453. The reversal of 55721540450 is 5404512755.

It is not an unprimeable number, because it can be changed into a prime (55721540453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328346 + ... + 468245.

It is an arithmetic number, because the mean of its divisors is an integer number (4321511600).

Almost surely, 2^55721540450 is an apocalyptic number.

55721540450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55721540450 is a deficient number, since it is larger than the sum of its proper divisors (47994737950).

55721540450 is a wasteful number, since it uses less digits than its factorization.

55721540450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798002 (or 797997 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 38.

The spelling of 55721540450 in words is "fifty-five billion, seven hundred twenty-one million, five hundred forty thousand, four hundred fifty".