291943871492 has 96 divisors (see below), whose sum is σ = 661950116352. Its totient is φ = 109494798336.

The previous prime is 291943871467. The next prime is 291943871497. The reversal of 291943871492 is 294178349192.

It is not an unprimeable number, because it can be changed into a prime (291943871497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 791738 + ... + 1100334.

It is an arithmetic number, because the mean of its divisors is an integer number (6895313712).

Almost surely, 2^291943871492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291943871492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330975058176).

291943871492 is an abundant number, since it is smaller than the sum of its proper divisors (370006244860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

291943871492 is a wasteful number, since it uses less digits than its factorization.

291943871492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308757 (or 308755 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The spelling of 291943871492 in words is "two hundred ninety-one billion, nine hundred forty-three million, eight hundred seventy-one thousand, four hundred ninety-two".