291655082601 has 27 divisors (see below), whose sum is σ = 435382578813. Its totient is φ = 188132166360.

The previous prime is 291655082591. The next prime is 291655082639. The reversal of 291655082601 is 106280556192.

The square root of 291655082601 is 540051.

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

291655082601 is a `hidden beast` number, since 2 + 9 + 16 + 550 + 82 + 6 + 0 + 1 = 666.

It is not a de Polignac number, because 291655082601 - 2²⁵ = 291621528169 is a prime.

It is a super-2 number, since 2×291655082601² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (291655082651) 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, 50221840 + ... + 50227646.

Almost surely, 2^291655082601 is an apocalyptic number.

291655082601 is the 540051-st square number.

291655082601 is the 270026-th centered octagonal number.

It is an amenable number.

291655082601 is a deficient number, since it is larger than the sum of its proper divisors (143727496212).

291655082601 is an frugal number, since it uses more digits than its factorization.

291655082601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11682 (or 5841 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 291655082601 in words is "two hundred ninety-one billion, six hundred fifty-five million, eighty-two thousand, six hundred one".