84109836251 has 16 divisors (see below), whose sum is σ = 97908963840. Its totient is φ = 70765517760.

The previous prime is 84109836247. The next prime is 84109836271. The reversal of 84109836251 is 15263890148.

It is a happy number.

It is not a de Polignac number, because 84109836251 - 2² = 84109836247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84109836196 and 84109836205.

It is not an unprimeable number, because it can be changed into a prime (84109836221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 259946 + ... + 485583.

It is an arithmetic number, because the mean of its divisors is an integer number (6119310240).

Almost surely, 2^84109836251 is an apocalyptic number.

84109836251 is a deficient number, since it is larger than the sum of its proper divisors (13799127589).

84109836251 is a wasteful number, since it uses less digits than its factorization.

84109836251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745834.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 84109836251 in words is "eighty-four billion, one hundred nine million, eight hundred thirty-six thousand, two hundred fifty-one".