1815366015055 has 4 divisors (see below), whose sum is σ = 2178439218072. Its totient is φ = 1452292812040.

The previous prime is 1815366015053. The next prime is 1815366015059. The reversal of 1815366015055 is 5505106635181.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1815366015055 - 2¹ = 1815366015053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1815366014996 and 1815366015014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1815366015053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181536601501 + ... + 181536601510.

It is an arithmetic number, because the mean of its divisors is an integer number (544609804518).

Almost surely, 2^{1815366015055} is an apocalyptic number.

1815366015055 is a deficient number, since it is larger than the sum of its proper divisors (363073203017).

1815366015055 is an equidigital number, since it uses as much as digits as its factorization.

1815366015055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363073203016.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 1815366015055 in words is "one trillion, eight hundred fifteen billion, three hundred sixty-six million, fifteen thousand, fifty-five".