291242905550 has 12 divisors (see below), whose sum is σ = 541711804416. Its totient is φ = 116497162200.

The previous prime is 291242905543. The next prime is 291242905571. The reversal of 291242905550 is 55509242192.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2912429006 + ... + 2912429105.

It is an arithmetic number, because the mean of its divisors is an integer number (45142650368).

Almost surely, 2^291242905550 is an apocalyptic number.

291242905550 is a deficient number, since it is larger than the sum of its proper divisors (250468898866).

291242905550 is a wasteful number, since it uses less digits than its factorization.

291242905550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5824858123 (or 5824858118 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 291242905550 in words is "two hundred ninety-one billion, two hundred forty-two million, nine hundred five thousand, five hundred fifty".