291042610520841 has 27 divisors (see below), whose sum is σ = 425789611385229. Its totient is φ = 191569689873432.

The previous prime is 291042610520821. The next prime is 291042610520903. The reversal of 291042610520841 is 148025016240192.

The square root of 291042610520841 is 17059971.

It is a perfect power (a square), and thus also a powerful number.

291042610520841 is a `hidden beast` number, since 2 + 9 + 1 + 0 + 4 + 2 + 610 + 5 + 20 + 8 + 4 + 1 = 666.

It is not a de Polignac number, because 291042610520841 - 2⁹ = 291042610520329 is a prime.

It is a super-2 number, since 2×291042610520841² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (291042610520801) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4043177136 + ... + 4043249118.

Almost surely, 2^{291042610520841} is an apocalyptic number.

291042610520841 is the 17059971-st square number.

291042610520841 is the 8529986-th centered octagonal number.

It is an amenable number.

291042610520841 is a deficient number, since it is larger than the sum of its proper divisors (134747000864388).

291042610520841 is an frugal number, since it uses more digits than its factorization.

291042610520841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144130 (or 72065 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 291042610520841 in words is "two hundred ninety-one trillion, forty-two billion, six hundred ten million, five hundred twenty thousand, eight hundred forty-one".