7866485631 has 24 divisors (see below), whose sum is σ = 11861066880. Its totient is φ = 5018112000.

The previous prime is 7866485609. The next prime is 7866485639. The reversal of 7866485631 is 1365846687.

7866485631 is a `hidden beast` number, since 78 + 6 + 6 + 4 + 8 + 563 + 1 = 666.

It is not a de Polignac number, because 7866485631 - 2¹⁰ = 7866484607 is a prime.

It is a super-2 number, since 2×7866485631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7866485639) 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 23 ways as a sum of consecutive naturals, for example, 133570 + ... + 183231.

It is an arithmetic number, because the mean of its divisors is an integer number (494211120).

Almost surely, 2^7866485631 is an apocalyptic number.

7866485631 is a deficient number, since it is larger than the sum of its proper divisors (3994581249).

7866485631 is a wasteful number, since it uses less digits than its factorization.

7866485631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316927 (or 316924 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 7866485631 is about 88693.2107379139. The cubic root of 7866485631 is about 1988.8113260940.

The spelling of 7866485631 in words is "seven billion, eight hundred sixty-six million, four hundred eighty-five thousand, six hundred thirty-one".