55273890815 has 96 divisors (see below), whose sum is σ = 82457403840. Its totient is φ = 35282903040.

The previous prime is 55273890811. The next prime is 55273890871. The reversal of 55273890815 is 51809837255.

It is a Cunningham number, because it is equal to 235104²-1.

It is not a de Polignac number, because 55273890815 - 2² = 55273890811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55273890811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15279887 + ... + 15283503.

It is an arithmetic number, because the mean of its divisors is an integer number (858931290).

Almost surely, 2^55273890815 is an apocalyptic number.

55273890815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55273890815 is a deficient number, since it is larger than the sum of its proper divisors (27183513025).

55273890815 is a wasteful number, since it uses less digits than its factorization.

55273890815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3742 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 53.

The spelling of 55273890815 in words is "fifty-five billion, two hundred seventy-three million, eight hundred ninety thousand, eight hundred fifteen".