291382282864 has 20 divisors (see below), whose sum is σ = 564580973880. Its totient is φ = 145683967040.

The previous prime is 291382282853. The next prime is 291382282871. The reversal of 291382282864 is 468282283192.

It is a super-2 number, since 2×291382282864² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105382 + ... + 770629.

It is an arithmetic number, because the mean of its divisors is an integer number (28229048694).

Almost surely, 2^291382282864 is an apocalyptic number.

It is an amenable number.

291382282864 is a deficient number, since it is larger than the sum of its proper divisors (273198691016).

291382282864 is a wasteful number, since it uses less digits than its factorization.

291382282864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896808 (or 896802 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The spelling of 291382282864 in words is "two hundred ninety-one billion, three hundred eighty-two million, two hundred eighty-two thousand, eight hundred sixty-four".