1982481451640 has 32 divisors (see below), whose sum is σ = 4483937122560. Its totient is φ = 788840784000.

The previous prime is 1982481451633. The next prime is 1982481451649. The reversal of 1982481451640 is 461541842891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982481451649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129735911 + ... + 129751190.

It is an arithmetic number, because the mean of its divisors is an integer number (140123035080).

Almost surely, 2^{1982481451640} is an apocalyptic number.

1982481451640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982481451640 is an abundant number, since it is smaller than the sum of its proper divisors (2501455670920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1982481451640 is a wasteful number, since it uses less digits than its factorization.

1982481451640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259487303 (or 259487299 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 1982481451640 in words is "one trillion, nine hundred eighty-two billion, four hundred eighty-one million, four hundred fifty-one thousand, six hundred forty".