291451046409 has 6 divisors (see below), whose sum is σ = 420984844826. Its totient is φ = 194300697600.

The previous prime is 291451046389. The next prime is 291451046413. The reversal of 291451046409 is 904640154192.

291451046409 is a `hidden beast` number, since 2 + 91 + 4 + 510 + 4 + 6 + 40 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 236265989184 + 55185057225 = 486072^2 + 234915^2 .

It is not a de Polignac number, because 291451046409 - 2⁸ = 291451046153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291451046309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16191724792 + ... + 16191724809.

Almost surely, 2^291451046409 is an apocalyptic number.

It is an amenable number.

291451046409 is a deficient number, since it is larger than the sum of its proper divisors (129533798417).

291451046409 is a wasteful number, since it uses less digits than its factorization.

291451046409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32383449607 (or 32383449604 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 291451046409 in words is "two hundred ninety-one billion, four hundred fifty-one million, forty-six thousand, four hundred nine".