1165554011355 has 16 divisors (see below), whose sum is σ = 1888492577280. Its totient is φ = 613760086368.

The previous prime is 1165554011333. The next prime is 1165554011437. The reversal of 1165554011355 is 5531104555611.

It is a happy number.

It is not a de Polignac number, because 1165554011355 - 2⁸ = 1165554011099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491793757 + ... + 491796126.

It is an arithmetic number, because the mean of its divisors is an integer number (118030786080).

Almost surely, 2^{1165554011355} is an apocalyptic number.

1165554011355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1165554011355 is a deficient number, since it is larger than the sum of its proper divisors (722938565925).

1165554011355 is an equidigital number, since it uses as much as digits as its factorization.

1165554011355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983589970.

The product of its (nonzero) digits is 225000, while the sum is 42.

Adding to 1165554011355 its reverse (5531104555611), we get a palindrome (6696658566966).

The spelling of 1165554011355 in words is "one trillion, one hundred sixty-five billion, five hundred fifty-four million, eleven thousand, three hundred fifty-five".