291434891460 has 24 divisors (see below), whose sum is σ = 816017696256. Its totient is φ = 77715971040.

The previous prime is 291434891441. The next prime is 291434891477. The reversal of 291434891460 is 64198434192.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2428624036 + ... + 2428624155.

It is an arithmetic number, because the mean of its divisors is an integer number (34000737344).

Almost surely, 2^291434891460 is an apocalyptic number.

291434891460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291434891460 is an abundant number, since it is smaller than the sum of its proper divisors (524582804796).

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

291434891460 is a wasteful number, since it uses less digits than its factorization.

291434891460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857248203 (or 4857248201 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 291434891460 in words is "two hundred ninety-one billion, four hundred thirty-four million, eight hundred ninety-one thousand, four hundred sixty".