1815514514445 has 16 divisors (see below), whose sum is σ = 2906628621120. Its totient is φ = 967672608384.

The previous prime is 1815514514423. The next prime is 1815514514501. The reversal of 1815514514445 is 5444154155181.

It is not a de Polignac number, because 1815514514445 - 2⁶ = 1815514514381 is a prime.

It is a super-2 number, since 2×1815514514445² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1815514514394 and 1815514514403.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37587519 + ... + 37635788.

It is an arithmetic number, because the mean of its divisors is an integer number (181664288820).

Almost surely, 2^{1815514514445} is an apocalyptic number.

1815514514445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1815514514445 is a deficient number, since it is larger than the sum of its proper divisors (1091114106675).

1815514514445 is a wasteful number, since it uses less digits than its factorization.

1815514514445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75224924.

The product of its digits is 1280000, while the sum is 48.

The spelling of 1815514514445 in words is "one trillion, eight hundred fifteen billion, five hundred fourteen million, five hundred fourteen thousand, four hundred forty-five".