1005110561091 has 16 divisors (see below), whose sum is σ = 1649412203264. Its totient is φ = 530168207904.

The previous prime is 1005110561057. The next prime is 1005110561107. The reversal of 1005110561091 is 1901650115001.

It is not a de Polignac number, because 1005110561091 - 2¹³ = 1005110552899 is a prime.

It is a super-2 number, since 2×1005110561091² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005110561011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1840861561 + ... + 1840862106.

It is an arithmetic number, because the mean of its divisors is an integer number (103088262704).

Almost surely, 2^{1005110561091} is an apocalyptic number.

1005110561091 is a deficient number, since it is larger than the sum of its proper divisors (644301642173).

1005110561091 is a wasteful number, since it uses less digits than its factorization.

1005110561091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681723690.

The product of its (nonzero) digits is 1350, while the sum is 30.

Adding to 1005110561091 its reverse (1901650115001), we get a palindrome (2906760676092).

The spelling of 1005110561091 in words is "one trillion, five billion, one hundred ten million, five hundred sixty-one thousand, ninety-one".