84174478249 has 16 divisors (see below), whose sum is σ = 89628256080. Its totient is φ = 78776893440.

The previous prime is 84174478207. The next prime is 84174478261. The reversal of 84174478249 is 94287447148.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 30856435600 + 53318042649 = 175660^2 + 230907^2 .

It is a cyclic number.

It is not a de Polignac number, because 84174478249 - 2³¹ = 82026994601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84174478193 and 84174478202.

It is not an unprimeable number, because it can be changed into a prime (84174478049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9736969 + ... + 9745609.

It is an arithmetic number, because the mean of its divisors is an integer number (5601766005).

Almost surely, 2^84174478249 is an apocalyptic number.

It is an amenable number.

84174478249 is a deficient number, since it is larger than the sum of its proper divisors (5453777831).

84174478249 is a wasteful number, since it uses less digits than its factorization.

84174478249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820.

The product of its digits is 14450688, while the sum is 58.

The spelling of 84174478249 in words is "eighty-four billion, one hundred seventy-four million, four hundred seventy-eight thousand, two hundred forty-nine".