1085198370553 has 4 divisors (see below), whose sum is σ = 1183852767888. Its totient is φ = 986543973220.

The previous prime is 1085198370541. The next prime is 1085198370589. The reversal of 1085198370553 is 3550738915801.

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 1085198370553 - 2²⁹ = 1084661499641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1085198370494 and 1085198370503.

It is not an unprimeable number, because it can be changed into a prime (1085198370533) 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, 49327198651 + ... + 49327198672.

It is an arithmetic number, because the mean of its divisors is an integer number (295963191972).

Almost surely, 2^{1085198370553} is an apocalyptic number.

It is an amenable number.

1085198370553 is a deficient number, since it is larger than the sum of its proper divisors (98654397335).

1085198370553 is an equidigital number, since it uses as much as digits as its factorization.

1085198370553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98654397334.

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 1085198370553 in words is "one trillion, eighty-five billion, one hundred ninety-eight million, three hundred seventy thousand, five hundred fifty-three".