1165123005645 has 96 divisors (see below), whose sum is σ = 1987766524800. Its totient is φ = 581138841600.

The previous prime is 1165123005619. The next prime is 1165123005677. The reversal of 1165123005645 is 5465003215611.

It is not a de Polignac number, because 1165123005645 - 2⁶ = 1165123005581 is a prime.

It is a super-3 number, since 3×1165123005645³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1254168541 + ... + 1254169469.

It is an arithmetic number, because the mean of its divisors is an integer number (20705901300).

Almost surely, 2^{1165123005645} is an apocalyptic number.

1165123005645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1165123005645 is a deficient number, since it is larger than the sum of its proper divisors (822643519155).

1165123005645 is a wasteful number, since it uses less digits than its factorization.

1165123005645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 1165123005645 in words is "one trillion, one hundred sixty-five billion, one hundred twenty-three million, five thousand, six hundred forty-five".