1129561795072 has 20 divisors (see below), whose sum is σ = 2256917415786. Its totient is φ = 564780897280.

The previous prime is 1129561795027. The next prime is 1129561795079. The reversal of 1129561795072 is 2705971659211.

It can be written as a sum of positive squares in only one way, i.e., 752840816896 + 376720978176 = 867664^2 + 613776^2 .

It is not an unprimeable number, because it can be changed into a prime (1129561795079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103087179 + ... + 1103088202.

Almost surely, 2^{1129561795072} is an apocalyptic number.

It is an amenable number.

1129561795072 is a deficient number, since it is larger than the sum of its proper divisors (1127355620714).

1129561795072 is an frugal number, since it uses more digits than its factorization.

1129561795072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206175399 (or 2206175383 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 55.

The spelling of 1129561795072 in words is "one trillion, one hundred twenty-nine billion, five hundred sixty-one million, seven hundred ninety-five thousand, seventy-two".