1281021468384 has 48 divisors (see below), whose sum is σ = 3843064407168. Its totient is φ = 366006133632.

The previous prime is 1281021468329. The next prime is 1281021468437. The reversal of 1281021468384 is 4838641201821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953140302 + ... + 953141645.

It is an arithmetic number, because the mean of its divisors is an integer number (80063841816).

Almost surely, 2^{1281021468384} is an apocalyptic number.

1281021468384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1281021468384 is an abundant number, since it is smaller than the sum of its proper divisors (2562042938784).

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

1281021468384 is a wasteful number, since it uses less digits than its factorization.

1281021468384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906281967 (or 1906281959 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The spelling of 1281021468384 in words is "one trillion, two hundred eighty-one billion, twenty-one million, four hundred sixty-eight thousand, three hundred eighty-four".