1011323642865 has 16 divisors (see below), whose sum is σ = 1620173905728. Its totient is φ = 538687250496.

The previous prime is 1011323642839. The next prime is 1011323642929. The reversal of 1011323642865 is 5682463231101.

It is not a de Polignac number, because 1011323642865 - 2¹⁸ = 1011323380721 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, 42822742 + ... + 42846351.

It is an arithmetic number, because the mean of its divisors is an integer number (101260869108).

Almost surely, 2^{1011323642865} is an apocalyptic number.

1011323642865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1011323642865 is a deficient number, since it is larger than the sum of its proper divisors (608850262863).

1011323642865 is an equidigital number, since it uses as much as digits as its factorization.

1011323642865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85669888.

The product of its (nonzero) digits is 207360, while the sum is 42.

Adding to 1011323642865 its reverse (5682463231101), we get a palindrome (6693786873966).

The spelling of 1011323642865 in words is "one trillion, eleven billion, three hundred twenty-three million, six hundred forty-two thousand, eight hundred sixty-five".