55012775721 has 8 divisors (see below), whose sum is σ = 73355765280. Its totient is φ = 36672484992.

The previous prime is 55012775707. The next prime is 55012775747. The reversal of 55012775721 is 12757721055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55012775721 - 2⁷ = 55012775593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55012775821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626655 + ... + 709028.

It is an arithmetic number, because the mean of its divisors is an integer number (9169470660).

Almost surely, 2^55012775721 is an apocalyptic number.

It is an amenable number.

55012775721 is a deficient number, since it is larger than the sum of its proper divisors (18342989559).

55012775721 is a wasteful number, since it uses less digits than its factorization.

55012775721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349415.

The product of its (nonzero) digits is 171500, while the sum is 42.

The spelling of 55012775721 in words is "fifty-five billion, twelve million, seven hundred seventy-five thousand, seven hundred twenty-one".