8521706757394 has 8 divisors (see below), whose sum is σ = 13534475438268. Its totient is φ = 4010214944640.

The previous prime is 8521706757383. The next prime is 8521706757407. The reversal of 8521706757394 is 4937576071258.

It can be written as a sum of positive squares in 2 ways, for example, as 7532252805025 + 989453952369 = 2744495^2 + 994713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125319216987 + ... + 125319217054.

It is a 1-persistent number, because it is pandigital, but 2⋅8521706757394 = 17043413514788 is not.

Almost surely, 2^{8521706757394} is an apocalyptic number.

8521706757394 is a deficient number, since it is larger than the sum of its proper divisors (5012768680874).

8521706757394 is a wasteful number, since it uses less digits than its factorization.

8521706757394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250638434060.

The product of its (nonzero) digits is 88905600, while the sum is 64.

The spelling of 8521706757394 in words is "eight trillion, five hundred twenty-one billion, seven hundred six million, seven hundred fifty-seven thousand, three hundred ninety-four".