1461994809 has 8 divisors (see below), whose sum is σ = 2126537952. Its totient is φ = 886057440.

The previous prime is 1461994799. The next prime is 1461994811. The reversal of 1461994809 is 9084991641.

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

It is not a de Polignac number, because 1461994809 - 2⁸ = 1461994553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1461994909) 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, 22151404 + ... + 22151469.

It is an arithmetic number, because the mean of its divisors is an integer number (265817244).

Almost surely, 2^1461994809 is an apocalyptic number.

It is an amenable number.

1461994809 is a deficient number, since it is larger than the sum of its proper divisors (664543143).

1461994809 is a wasteful number, since it uses less digits than its factorization.

1461994809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44302887.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1461994809 is about 38236.0407076883. The cubic root of 1461994809 is about 1134.9636268238.

The spelling of 1461994809 in words is "one billion, four hundred sixty-one million, nine hundred ninety-four thousand, eight hundred nine".