84210540291 has 12 divisors (see below), whose sum is σ = 121643424240. Its totient is φ = 56137601520.

The previous prime is 84210540277. The next prime is 84210540301. The reversal of 84210540291 is 19204501248.

84210540291 is a `hidden beast` number, since 8 + 4 + 21 + 0 + 540 + 2 + 91 = 666.

It is not a de Polignac number, because 84210540291 - 2⁹ = 84210539779 is a prime.

It is a super-2 number, since 2×84210540291² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84210500291) 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, 27151 + ... + 411288.

It is an arithmetic number, because the mean of its divisors is an integer number (10136952020).

Almost surely, 2^84210540291 is an apocalyptic number.

84210540291 is a deficient number, since it is larger than the sum of its proper divisors (37432883949).

84210540291 is a wasteful number, since it uses less digits than its factorization.

84210540291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459786 (or 459783 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 84210540291 in words is "eighty-four billion, two hundred ten million, five hundred forty thousand, two hundred ninety-one".