1005145235511 has 4 divisors (see below), whose sum is σ = 1340193647352. Its totient is φ = 670096823672.

The previous prime is 1005145235477. The next prime is 1005145235519. The reversal of 1005145235511 is 1155325415001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1005145235511 - 2⁷ = 1005145235383 is a prime.

It is a super-2 number, since 2×1005145235511² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005145235519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167524205916 + ... + 167524205921.

It is an arithmetic number, because the mean of its divisors is an integer number (335048411838).

Almost surely, 2^{1005145235511} is an apocalyptic number.

1005145235511 is a deficient number, since it is larger than the sum of its proper divisors (335048411841).

1005145235511 is an equidigital number, since it uses as much as digits as its factorization.

1005145235511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335048411840.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 1005145235511 in words is "one trillion, five billion, one hundred forty-five million, two hundred thirty-five thousand, five hundred eleven".