1982776493551 has 12 divisors (see below), whose sum is σ = 2307511759080. Its totient is φ = 1698773595120.

The previous prime is 1982776493497. The next prime is 1982776493609. The reversal of 1982776493551 is 1553946772891.

It is not a de Polignac number, because 1982776493551 - 2¹³ = 1982776485359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982776491551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8805705 + ... + 9028066.

It is an arithmetic number, because the mean of its divisors is an integer number (192292646590).

Almost surely, 2^{1982776493551} is an apocalyptic number.

1982776493551 is a deficient number, since it is larger than the sum of its proper divisors (324735265529).

1982776493551 is a wasteful number, since it uses less digits than its factorization.

1982776493551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17836054 (or 17836047 counting only the distinct ones).

The product of its digits is 114307200, while the sum is 67.

The spelling of 1982776493551 in words is "one trillion, nine hundred eighty-two billion, seven hundred seventy-six million, four hundred ninety-three thousand, five hundred fifty-one".