1000720800961 has 12 divisors (see below), whose sum is σ = 1165653903360. Its totient is φ = 856618497000.

The previous prime is 1000720800949. The next prime is 1000720800967. The reversal of 1000720800961 is 1690080270001.

It is a happy number.

It is not a de Polignac number, because 1000720800961 - 2⁹ = 1000720800449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000720800967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13560321 + ... + 13633918.

It is an arithmetic number, because the mean of its divisors is an integer number (97137825280).

Almost surely, 2^{1000720800961} is an apocalyptic number.

It is an amenable number.

1000720800961 is a deficient number, since it is larger than the sum of its proper divisors (164933102399).

1000720800961 is an equidigital number, since it uses as much as digits as its factorization.

1000720800961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27195004 (or 27194997 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 1000720800961 in words is "one trillion, seven hundred twenty million, eight hundred thousand, nine hundred sixty-one".