291440917092 has 96 divisors (see below), whose sum is σ = 740799561600. Its totient is φ = 89171711616.

The previous prime is 291440917081. The next prime is 291440917093. The reversal of 291440917092 is 290719044192.

It is not an unprimeable number, because it can be changed into a prime (291440917093) 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, 4688278 + ... + 4750034.

It is an arithmetic number, because the mean of its divisors is an integer number (7716662100).

Almost surely, 2^291440917092 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 291440917092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370399780800).

291440917092 is an abundant number, since it is smaller than the sum of its proper divisors (449358644508).

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

291440917092 is a wasteful number, since it uses less digits than its factorization.

291440917092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61982 (or 61954 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 291440917092 in words is "two hundred ninety-one billion, four hundred forty million, nine hundred seventeen thousand, ninety-two".