84030917945 has 32 divisors (see below), whose sum is σ = 110137400352. Its totient is φ = 61172416512.

The previous prime is 84030917939. The next prime is 84030917981. The reversal of 84030917945 is 54971903048.

It can be written as a sum of positive squares in 16 ways, for example, as 44891439376 + 39139478569 = 211876^2 + 197837^2 .

It is a cyclic number.

It is not a de Polignac number, because 84030917945 - 2³⁶ = 15311441209 is a prime.

It is a super-2 number, since 2×84030917945² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84030917893 and 84030917902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13743209 + ... + 13749321.

It is an arithmetic number, because the mean of its divisors is an integer number (3441793761).

Almost surely, 2^84030917945 is an apocalyptic number.

It is an amenable number.

84030917945 is a deficient number, since it is larger than the sum of its proper divisors (26106482407).

84030917945 is a wasteful number, since it uses less digits than its factorization.

84030917945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 84030917945 in words is "eighty-four billion, thirty million, nine hundred seventeen thousand, nine hundred forty-five".