1985580663 has 16 divisors (see below), whose sum is σ = 2889524352. Its totient is φ = 1202796000.

The previous prime is 1985580661. The next prime is 1985580673. The reversal of 1985580663 is 3660855891.

It is not a de Polignac number, because 1985580663 - 2¹ = 1985580661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985580661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59748 + ... + 86838.

It is an arithmetic number, because the mean of its divisors is an integer number (180595272).

Almost surely, 2^1985580663 is an apocalyptic number.

1985580663 is a deficient number, since it is larger than the sum of its proper divisors (903943689).

1985580663 is a wasteful number, since it uses less digits than its factorization.

1985580663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29326.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 1985580663 is about 44559.8548359395. The cubic root of 1985580663 is about 1256.8858729242.

The spelling of 1985580663 in words is "one billion, nine hundred eighty-five million, five hundred eighty thousand, six hundred sixty-three".