1155867823605 has 32 divisors (see below), whose sum is σ = 2026324920960. Its totient is φ = 557973492480.

The previous prime is 1155867823541. The next prime is 1155867823639. The reversal of 1155867823605 is 5063287685511.

It is not a de Polignac number, because 1155867823605 - 2⁶ = 1155867823541 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 15257542 + ... + 15333111.

It is an arithmetic number, because the mean of its divisors is an integer number (63322653780).

Almost surely, 2^{1155867823605} is an apocalyptic number.

1155867823605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155867823605 is a deficient number, since it is larger than the sum of its proper divisors (870457097355).

1155867823605 is a wasteful number, since it uses less digits than its factorization.

1155867823605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30590901.

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 1155867823605 in words is "one trillion, one hundred fifty-five billion, eight hundred sixty-seven million, eight hundred twenty-three thousand, six hundred five".