291201052869 has 12 divisors (see below), whose sum is σ = 424554807456. Its totient is φ = 192319697832.

The previous prime is 291201052853. The next prime is 291201052897. The reversal of 291201052869 is 968250102192.

It is a happy number.

291201052869 is a `hidden beast` number, since 2 + 91 + 20 + 10 + 528 + 6 + 9 = 666.

It is not a de Polignac number, because 291201052869 - 2⁴ = 291201052853 is a prime.

It is a super-2 number, since 2×291201052869² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291201052369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151193769 + ... + 151195694.

It is an arithmetic number, because the mean of its divisors is an integer number (35379567288).

Almost surely, 2^291201052869 is an apocalyptic number.

It is an amenable number.

291201052869 is a deficient number, since it is larger than the sum of its proper divisors (133353754587).

291201052869 is a wasteful number, since it uses less digits than its factorization.

291201052869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302389576 (or 302389573 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 291201052869 in words is "two hundred ninety-one billion, two hundred one million, fifty-two thousand, eight hundred sixty-nine".