2009464093561 has 2 divisors, whose sum is σ = 2009464093562. Its totient is φ = 2009464093560.

The previous prime is 2009464093547. The next prime is 2009464093589. The reversal of 2009464093561 is 1653904649002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1968285537936 + 41178555625 = 1402956^2 + 202925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009464093561 is a prime.

It is a super-3 number, since 3×2009464093561³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2009464093261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004732046780 + 1004732046781.

It is an arithmetic number, because the mean of its divisors is an integer number (1004732046781).

Almost surely, 2^{2009464093561} is an apocalyptic number.

It is an amenable number.

2009464093561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009464093561 is an equidigital number, since it uses as much as digits as its factorization.

2009464093561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 2009464093561 in words is "two trillion, nine billion, four hundred sixty-four million, ninety-three thousand, five hundred sixty-one".