1980710685 has 32 divisors (see below), whose sum is σ = 3523248000. Its totient is φ = 1055783808.

The previous prime is 1980710671. The next prime is 1980710713. The reversal of 1980710685 is 5860170891.

It is not a de Polignac number, because 1980710685 - 2⁸ = 1980710429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1980710685.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 345321 + ... + 351009.

It is an arithmetic number, because the mean of its divisors is an integer number (110101500).

Almost surely, 2^1980710685 is an apocalyptic number.

1980710685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1980710685 is a deficient number, since it is larger than the sum of its proper divisors (1542537315).

1980710685 is a wasteful number, since it uses less digits than its factorization.

1980710685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8282 (or 8276 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 1980710685 is about 44505.1759349404. The cubic root of 1980710685 is about 1255.8574554328.

The spelling of 1980710685 in words is "one billion, nine hundred eighty million, seven hundred ten thousand, six hundred eighty-five".