1091594502436 has 27 divisors (see below), whose sum is σ = 1917561970611. Its totient is φ = 543727514304.

The previous prime is 1091594502343. The next prime is 1091594502451. The reversal of 1091594502436 is 6342054951901.

The square root of 1091594502436 is 1044794.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 423033168100 + 668561334336 = 650410^2 + 817656^2 .

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 1091594502436.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 654040210 + ... + 654041878.

Almost surely, 2^{1091594502436} is an apocalyptic number.

1091594502436 is the 1044794-th square number.

It is an amenable number.

1091594502436 is a deficient number, since it is larger than the sum of its proper divisors (825967468175).

1091594502436 is an frugal number, since it uses more digits than its factorization.

1091594502436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 1984 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

Multiplying 1091594502436 by its sum of digits (49), we get a square (53488130619364 = 7313558²).

The spelling of 1091594502436 in words is "one trillion, ninety-one billion, five hundred ninety-four million, five hundred two thousand, four hundred thirty-six".