1085972311649 has 4 divisors (see below), whose sum is σ = 1133188499136. Its totient is φ = 1038756124164.

The previous prime is 1085972311637. The next prime is 1085972311667. The reversal of 1085972311649 is 9461132795801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1085972311649 - 2⁸ = 1085972311393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1085972311594 and 1085972311603.

It is not an unprimeable number, because it can be changed into a prime (1085972311609) 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, 23608093709 + ... + 23608093754.

It is an arithmetic number, because the mean of its divisors is an integer number (283297124784).

It is a 1-persistent number, because it is pandigital, but 2⋅1085972311649 = 2171944623298 is not.

Almost surely, 2^{1085972311649} is an apocalyptic number.

It is an amenable number.

1085972311649 is a deficient number, since it is larger than the sum of its proper divisors (47216187487).

1085972311649 is an equidigital number, since it uses as much as digits as its factorization.

1085972311649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47216187486.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 1085972311649 in words is "one trillion, eighty-five billion, nine hundred seventy-two million, three hundred eleven thousand, six hundred forty-nine".