1980958550 has 24 divisors (see below), whose sum is σ = 3688602456. Its totient is φ = 791519040.

The previous prime is 1980958547. The next prime is 1980958607. The reversal of 1980958550 is 558590891.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25709 + ... + 67991.

It is an arithmetic number, because the mean of its divisors is an integer number (153691769).

Almost surely, 2^1980958550 is an apocalyptic number.

1980958550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1980958550 is a deficient number, since it is larger than the sum of its proper divisors (1707643906).

1980958550 is a wasteful number, since it uses less digits than its factorization.

1980958550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43232 (or 43227 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 50.

The square root of 1980958550 is about 44507.9605239332. The cubic root of 1980958550 is about 1255.9098390086.

The spelling of 1980958550 in words is "one billion, nine hundred eighty million, nine hundred fifty-eight thousand, five hundred fifty".