1091887064356 has 27 divisors (see below), whose sum is σ = 2100347644017. Its totient is φ = 496301852640.

The previous prime is 1091887064293. The next prime is 1091887064357. The reversal of 1091887064356 is 6534607881901.

The square root of 1091887064356 is 1044934.

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

1091887064356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1015922884900 + 75964179456 = 1007930^2 + 275616^2 .

It is a super-2 number, since 2×1091887064356² (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 1091887064356.

It is not an unprimeable number, because it can be changed into a prime (1091887064357) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22964800 + ... + 23012296.

Almost surely, 2^{1091887064356} is an apocalyptic number.

1091887064356 is the 1044934-th square number.

It is an amenable number.

1091887064356 is a deficient number, since it is larger than the sum of its proper divisors (1008460579661).

1091887064356 is an frugal number, since it uses more digits than its factorization.

1091887064356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95020 (or 47510 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 1091887064356 in words is "one trillion, ninety-one billion, eight hundred eighty-seven million, sixty-four thousand, three hundred fifty-six".