8509990642425 has 72 divisors (see below), whose sum is σ = 15736955270400. Its totient is φ = 4391435836800.

The previous prime is 8509990642357. The next prime is 8509990642507. The reversal of 8509990642425 is 5242460999058.

8509990642425 is a `hidden beast` number, since 85 + 0 + 9 + 9 + 90 + 6 + 42 + 425 = 666.

It is not a de Polignac number, because 8509990642425 - 2¹¹ = 8509990640377 is a prime.

It is a super-2 number, since 2×8509990642425² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 38300551 + ... + 38522099.

It is an arithmetic number, because the mean of its divisors is an integer number (218568823200).

Almost surely, 2^{8509990642425} is an apocalyptic number.

It is an amenable number.

8509990642425 is a deficient number, since it is larger than the sum of its proper divisors (7226964627975).

8509990642425 is a wasteful number, since it uses less digits than its factorization.

8509990642425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227103 (or 227095 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 8509990642425 in words is "eight trillion, five hundred nine billion, nine hundred ninety million, six hundred forty-two thousand, four hundred twenty-five".