291381316204 has 24 divisors (see below), whose sum is σ = 557633538000. Its totient is φ = 132122215680.

The previous prime is 291381316201. The next prime is 291381316319. The reversal of 291381316204 is 402613183192.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (291381316201) 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, 8077729 + ... + 8113720.

It is an arithmetic number, because the mean of its divisors is an integer number (23234730750).

Almost surely, 2^291381316204 is an apocalyptic number.

It is an amenable number.

291381316204 is a deficient number, since it is larger than the sum of its proper divisors (266252221796).

291381316204 is a wasteful number, since it uses less digits than its factorization.

291381316204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16191873 (or 16191871 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

Adding to 291381316204 its reverse (402613183192), we get a palindrome (693994499396).

The spelling of 291381316204 in words is "two hundred ninety-one billion, three hundred eighty-one million, three hundred sixteen thousand, two hundred four".