1281530325684 has 36 divisors (see below), whose sum is σ = 3478439457024. Its totient is φ = 366151521456.

The previous prime is 1281530325683. The next prime is 1281530325731. The reversal of 1281530325684 is 4865230351821.

It is a super-2 number, since 2×1281530325684² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281530325683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089736084 + ... + 1089737259.

Almost surely, 2^{1281530325684} is an apocalyptic number.

1281530325684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1281530325684 is an abundant number, since it is smaller than the sum of its proper divisors (2196909131340).

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

1281530325684 is a wasteful number, since it uses less digits than its factorization.

1281530325684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179473364 (or 2179473355 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 1281530325684 in words is "one trillion, two hundred eighty-one billion, five hundred thirty million, three hundred twenty-five thousand, six hundred eighty-four".