1981952630120 has 32 divisors (see below), whose sum is σ = 4466813427720. Its totient is φ = 791461939200.

The previous prime is 1981952630087. The next prime is 1981952630123. The reversal of 1981952630120 is 210362591891.

It can be written as a sum of positive squares in 4 ways, for example, as 1981737538564 + 215091556 = 1407742^2 + 14666^2 .

It is not an unprimeable number, because it can be changed into a prime (1981952630123) 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, 41197937 + ... + 41246016.

Almost surely, 2^{1981952630120} is an apocalyptic number.

1981952630120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1981952630120 is an abundant number, since it is smaller than the sum of its proper divisors (2484860797600).

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

1981952630120 is a wasteful number, since it uses less digits than its factorization.

1981952630120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82444565 (or 82444561 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 1981952630120 in words is "one trillion, nine hundred eighty-one billion, nine hundred fifty-two million, six hundred thirty thousand, one hundred twenty".