1980691358 has 16 divisors (see below), whose sum is σ = 3074544000. Its totient is φ = 955866912.

The previous prime is 1980691283. The next prime is 1980691367. The reversal of 1980691358 is 8531960891.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 302948 + ... + 309416.

It is an arithmetic number, because the mean of its divisors is an integer number (192159000).

Almost surely, 2^1980691358 is an apocalyptic number.

1980691358 is a deficient number, since it is larger than the sum of its proper divisors (1093852642).

1980691358 is a wasteful number, since it uses less digits than its factorization.

1980691358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11779.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 1980691358 is about 44504.9588023627. The cubic root of 1980691358 is about 1255.8533706976.

The spelling of 1980691358 in words is "one billion, nine hundred eighty million, six hundred ninety-one thousand, three hundred fifty-eight".