291340892256 has 192 divisors, whose sum is σ = 808512606720. Its totient is φ = 91728322560.

The previous prime is 291340892237. The next prime is 291340892257. The reversal of 291340892256 is 652298043192.

It is a junction number, because it is equal to n+sod(n) for n = 291340892199 and 291340892208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291340892257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23794296 + ... + 23806536.

It is an arithmetic number, because the mean of its divisors is an integer number (4211003160).

Almost surely, 2^291340892256 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 291340892256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404256303360).

291340892256 is an abundant number, since it is smaller than the sum of its proper divisors (517171714464).

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

291340892256 is a wasteful number, since it uses less digits than its factorization.

291340892256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12469 (or 12461 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 291340892256 in words is "two hundred ninety-one billion, three hundred forty million, eight hundred ninety-two thousand, two hundred fifty-six".