1085320505631 has 32 divisors (see below), whose sum is σ = 1478482001920. Its totient is φ = 708068438784.

The previous prime is 1085320505623. The next prime is 1085320505677. The reversal of 1085320505631 is 1365050235801.

It is not a de Polignac number, because 1085320505631 - 2³ = 1085320505623 is a prime.

It is a super-2 number, since 2×1085320505631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1085320505631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085320505531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9202371 + ... + 9319563.

It is an arithmetic number, because the mean of its divisors is an integer number (46202562560).

Almost surely, 2^{1085320505631} is an apocalyptic number.

1085320505631 is a deficient number, since it is larger than the sum of its proper divisors (393161496289).

1085320505631 is a wasteful number, since it uses less digits than its factorization.

1085320505631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117655.

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

It can be divided in two parts, 1085320 and 505631, that added together give a palindrome (1590951).

The spelling of 1085320505631 in words is "one trillion, eighty-five billion, three hundred twenty million, five hundred five thousand, six hundred thirty-one".