291494963961 has 12 divisors (see below), whose sum is σ = 421432113492. Its totient is φ = 194152822656.

The previous prime is 291494963959. The next prime is 291494964011. The reversal of 291494963961 is 169369494192.

291494963961 is a `hidden beast` number, since 29 + 1 + 494 + 9 + 63 + 9 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47108097936 + 244386866025 = 217044^2 + 494355^2 .

It is not a de Polignac number, because 291494963961 - 2¹ = 291494963959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (291494963761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14752356 + ... + 14772101.

It is an arithmetic number, because the mean of its divisors is an integer number (35119342791).

Almost surely, 2^291494963961 is an apocalyptic number.

It is an amenable number.

291494963961 is a deficient number, since it is larger than the sum of its proper divisors (129937149531).

291494963961 is a wasteful number, since it uses less digits than its factorization.

291494963961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29525560 (or 29525557 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The spelling of 291494963961 in words is "two hundred ninety-one billion, four hundred ninety-four million, nine hundred sixty-three thousand, nine hundred sixty-one".