1461461561 has 8 divisors (see below), whose sum is σ = 1742861184. Its totient is φ = 1198216800.

The previous prime is 1461461549. The next prime is 1461461563. The reversal of 1461461561 is 1651641641.

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 1461461561 - 2¹⁰ = 1461460537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1461461563) 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, 4538540 + ... + 4538861.

It is an arithmetic number, because the mean of its divisors is an integer number (217857648).

Almost surely, 2^1461461561 is an apocalyptic number.

It is an amenable number.

1461461561 is a deficient number, since it is larger than the sum of its proper divisors (281399623).

1461461561 is an equidigital number, since it uses as much as digits as its factorization.

1461461561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077431.

The product of its digits is 17280, while the sum is 35.

The square root of 1461461561 is about 38229.0669648110. The cubic root of 1461461561 is about 1134.8256211625.

The spelling of 1461461561 in words is "one billion, four hundred sixty-one million, four hundred sixty-one thousand, five hundred sixty-one".