3318556647986 has 4 divisors (see below), whose sum is σ = 4977834971982. Its totient is φ = 1659278323992.

The previous prime is 3318556647953. The next prime is 3318556647997. The reversal of 3318556647986 is 6897466558133.

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., 2904825966025 + 413730681961 = 1704355^2 + 643219^2 .

It is a super-2 number, since 2×3318556647986² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829639161995 + ... + 829639161998.

Almost surely, 2^{3318556647986} is an apocalyptic number.

3318556647986 is a deficient number, since it is larger than the sum of its proper divisors (1659278323996).

3318556647986 is a wasteful number, since it uses less digits than its factorization.

3318556647986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659278323995.

The product of its digits is 783820800, while the sum is 71.

The spelling of 3318556647986 in words is "three trillion, three hundred eighteen billion, five hundred fifty-six million, six hundred forty-seven thousand, nine hundred eighty-six".