1980631520368 has 20 divisors (see below), whose sum is σ = 3837617958328. Its totient is φ = 990278498880.

The previous prime is 1980631520363. The next prime is 1980631520369. The reversal of 1980631520368 is 8630251360891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980631520363) 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, 1887771 + ... + 2743162.

Almost surely, 2^{1980631520368} is an apocalyptic number.

It is an amenable number.

1980631520368 is a deficient number, since it is larger than the sum of its proper divisors (1856986437960).

1980631520368 is a wasteful number, since it uses less digits than its factorization.

1980631520368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657672 (or 4657666 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 1980631520368 in words is "one trillion, nine hundred eighty billion, six hundred thirty-one million, five hundred twenty thousand, three hundred sixty-eight".