1089545578969 has 9 divisors (see below), whose sum is σ = 1098325862517. Its totient is φ = 1080834959484.

The previous prime is 1089545578943. The next prime is 1089545578991. The reversal of 1089545578969 is 9698755459801.

The square root of 1089545578969 is 1043813.

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

It is not a de Polignac number, because 1089545578969 - 2²⁹ = 1089008708057 is a prime.

It is a super-2 number, since 2×1089545578969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1089545578895 and 1089545578904.

It is not an unprimeable number, because it can be changed into a prime (1089545570969) 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, 132560142 + ... + 132568360.

Almost surely, 2^{1089545578969} is an apocalyptic number.

1089545578969 is the 1043813-rd square number.

1089545578969 is the 521907-th centered octagonal number.

It is an amenable number.

1089545578969 is a deficient number, since it is larger than the sum of its proper divisors (8780283548).

1089545578969 is an frugal number, since it uses more digits than its factorization.

1089545578969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692 (or 8346 counting only the distinct ones).

The product of its (nonzero) digits is 979776000, while the sum is 76.

The spelling of 1089545578969 in words is "one trillion, eighty-nine billion, five hundred forty-five million, five hundred seventy-eight thousand, nine hundred sixty-nine".