1980358559 has 4 divisors (see below), whose sum is σ = 1982181504. Its totient is φ = 1978535616.

The previous prime is 1980358547. The next prime is 1980358607. The reversal of 1980358559 is 9558530891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1980358559 - 2²⁴ = 1963581343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1980358559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980358519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909842 + ... + 912015.

It is an arithmetic number, because the mean of its divisors is an integer number (495545376).

Almost surely, 2^1980358559 is an apocalyptic number.

1980358559 is a deficient number, since it is larger than the sum of its proper divisors (1822945).

1980358559 is a wasteful number, since it uses less digits than its factorization.

1980358559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822944.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The square root of 1980358559 is about 44501.2197473283. The cubic root of 1980358559 is about 1255.7830299124.

The spelling of 1980358559 in words is "one billion, nine hundred eighty million, three hundred fifty-eight thousand, five hundred fifty-nine".