7713854649866 has 4 divisors (see below), whose sum is σ = 11570781974802. Its totient is φ = 3856927324932.

The previous prime is 7713854649821. The next prime is 7713854649881. The reversal of 7713854649866 is 6689464583177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3908643666841 + 3805210983025 = 1977029^2 + 1950695^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7713854649793 and 7713854649802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928463662465 + ... + 1928463662468.

Almost surely, 2^{7713854649866} is an apocalyptic number.

7713854649866 is a deficient number, since it is larger than the sum of its proper divisors (3856927324936).

7713854649866 is a wasteful number, since it uses less digits than its factorization.

7713854649866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856927324935.

The product of its digits is 1463132160, while the sum is 74.

The spelling of 7713854649866 in words is "seven trillion, seven hundred thirteen billion, eight hundred fifty-four million, six hundred forty-nine thousand, eight hundred sixty-six".