8521951617 has 12 divisors (see below), whose sum is σ = 12310456704. Its totient is φ = 5680852920.

The previous prime is 8521951597. The next prime is 8521951619. The reversal of 8521951617 is 7161591258.

8521951617 is a `hidden beast` number, since 8 + 5 + 21 + 9 + 5 + 1 + 617 = 666.

It is not a de Polignac number, because 8521951617 - 2¹² = 8521947521 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8521951619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116392 + ... + 174902.

It is an arithmetic number, because the mean of its divisors is an integer number (1025871392).

Almost surely, 2^8521951617 is an apocalyptic number.

It is an amenable number.

8521951617 is a deficient number, since it is larger than the sum of its proper divisors (3788505087).

8521951617 is a wasteful number, since it uses less digits than its factorization.

8521951617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74700 (or 74697 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 8521951617 is about 92314.4171676342. The cubic root of 8521951617 is about 2042.5828825069.

The spelling of 8521951617 in words is "eight billion, five hundred twenty-one million, nine hundred fifty-one thousand, six hundred seventeen".