7985485257 has 16 divisors (see below), whose sum is σ = 10831660608. Its totient is φ = 5232003840.

The previous prime is 7985485219. The next prime is 7985485271. The reversal of 7985485257 is 7525845897.

It is not a de Polignac number, because 7985485257 - 2¹⁰ = 7985484233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7985485257.

It is not an unprimeable number, because it can be changed into a prime (7985485457) 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, 3343 + ... + 126420.

It is an arithmetic number, because the mean of its divisors is an integer number (676978788).

Almost surely, 2^7985485257 is an apocalyptic number.

It is an amenable number.

7985485257 is a deficient number, since it is larger than the sum of its proper divisors (2846175351).

7985485257 is a wasteful number, since it uses less digits than its factorization.

7985485257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130120.

The product of its digits is 28224000, while the sum is 60.

The square root of 7985485257 is about 89361.5423826156. The cubic root of 7985485257 is about 1998.7897058251.

The spelling of 7985485257 in words is "seven billion, nine hundred eighty-five million, four hundred eighty-five thousand, two hundred fifty-seven".