1155123260415 has 24 divisors (see below), whose sum is σ = 2002432449888. Its totient is φ = 615998416320.

The previous prime is 1155123260399. The next prime is 1155123260441. The reversal of 1155123260415 is 5140623215511.

1155123260415 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 1 + 2 + 32 + 604 + 15 = 666.

It is not a de Polignac number, because 1155123260415 - 2⁴ = 1155123260399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155123260415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984819 + ... + 1811108.

It is an arithmetic number, because the mean of its divisors is an integer number (83434685412).

Almost surely, 2^{1155123260415} is an apocalyptic number.

1155123260415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155123260415 is a deficient number, since it is larger than the sum of its proper divisors (847309189473).

1155123260415 is a wasteful number, since it uses less digits than its factorization.

1155123260415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805119 (or 2805116 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 1155123260415 its reverse (5140623215511), we get a palindrome (6295746475926).

The spelling of 1155123260415 in words is "one trillion, one hundred fifty-five billion, one hundred twenty-three million, two hundred sixty thousand, four hundred fifteen".