1281956988348 has 72 divisors (see below), whose sum is σ = 3246646173680. Its totient is φ = 426509556480.

The previous prime is 1281956988311. The next prime is 1281956988439. The reversal of 1281956988348 is 8438896591821.

1281956988348 is a `hidden beast` number, since 1 + 2 + 8 + 19 + 569 + 8 + 8 + 3 + 48 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45677136 + ... + 45705192.

Almost surely, 2^{1281956988348} is an apocalyptic number.

1281956988348 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1281956988348 is an abundant number, since it is smaller than the sum of its proper divisors (1964689185332).

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

1281956988348 is a wasteful number, since it uses less digits than its factorization.

1281956988348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30427 (or 30422 counting only the distinct ones).

The product of its digits is 238878720, while the sum is 72.

The spelling of 1281956988348 in words is "one trillion, two hundred eighty-one billion, nine hundred fifty-six million, nine hundred eighty-eight thousand, three hundred forty-eight".