1986912980648 has 16 divisors (see below), whose sum is σ = 3853926040500. Its totient is φ = 959199369856.

The previous prime is 1986912980629. The next prime is 1986912980707. The reversal of 1986912980648 is 8460892196891.

It can be written as a sum of positive squares in 2 ways, for example, as 1979643372004 + 7269608644 = 1406998^2 + 85262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4282139813 + ... + 4282140276.

Almost surely, 2^{1986912980648} is an apocalyptic number.

It is an amenable number.

1986912980648 is a deficient number, since it is larger than the sum of its proper divisors (1867013059852).

1986912980648 is a wasteful number, since it uses less digits than its factorization.

1986912980648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564280124 (or 8564280120 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 71.

The spelling of 1986912980648 in words is "one trillion, nine hundred eighty-six billion, nine hundred twelve million, nine hundred eighty thousand, six hundred forty-eight".