1001000600561 has 8 divisors (see below), whose sum is σ = 1079895207720. Its totient is φ = 922376644992.

The previous prime is 1001000600533. The next prime is 1001000600609. The reversal of 1001000600561 is 1650060001001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2889707536 + 998110893025 = 53756^2 + 999055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001000600561 - 2¹⁸ = 1001000338417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001000600521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67655210 + ... + 67670003.

It is an arithmetic number, because the mean of its divisors is an integer number (134986900965).

Almost surely, 2^{1001000600561} is an apocalyptic number.

It is an amenable number.

1001000600561 is a deficient number, since it is larger than the sum of its proper divisors (78894607159).

1001000600561 is a wasteful number, since it uses less digits than its factorization.

1001000600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135325795.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 1001000600561 its reverse (1650060001001), we get a palindrome (2651060601562).

The spelling of 1001000600561 in words is "one trillion, one billion, six hundred thousand, five hundred sixty-one".