1980471766 has 32 divisors (see below), whose sum is σ = 3774210048. Its totient is φ = 758207520.

The previous prime is 1980471739. The next prime is 1980471767. The reversal of 1980471766 is 6671740891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980471767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169870 + ... + 181153.

It is an arithmetic number, because the mean of its divisors is an integer number (117944064).

Almost surely, 2^1980471766 is an apocalyptic number.

1980471766 is a deficient number, since it is larger than the sum of its proper divisors (1793738282).

1980471766 is a wasteful number, since it uses less digits than its factorization.

1980471766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351076.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 1980471766 is about 44502.4916830507. The cubic root of 1980471766 is about 1255.8069583605.

The spelling of 1980471766 in words is "one billion, nine hundred eighty million, four hundred seventy-one thousand, seven hundred sixty-six".