1089781493476 has 27 divisors (see below), whose sum is σ = 2065155122793. Its totient is φ = 502963546800.

The previous prime is 1089781493459. The next prime is 1089781493491. The reversal of 1089781493476 is 6743941879801.

The square root of 1089781493476 is 1043926.

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

It can be written as a sum of positive squares in only one way, i.e., 161210280100 + 928571213376 = 401510^2 + 963624^2 .

It is a Duffinian number.

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, 27122001 + ... + 27162151.

Almost surely, 2^{1089781493476} is an apocalyptic number.

1089781493476 is the 1043926-th square number.

It is an amenable number.

1089781493476 is a deficient number, since it is larger than the sum of its proper divisors (975373629317).

1089781493476 is an frugal number, since it uses more digits than its factorization.

1089781493476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80332 (or 40166 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 1089781493476 in words is "one trillion, eighty-nine billion, seven hundred eighty-one million, four hundred ninety-three thousand, four hundred seventy-six".