1392581981088 has 144 divisors (see below), whose sum is σ = 4134246480000. Its totient is φ = 443806336512.

The previous prime is 1392581981051. The next prime is 1392581981129. The reversal of 1392581981088 is 8801891852931.

1392581981088 is a `hidden beast` number, since 1 + 39 + 2 + 581 + 9 + 8 + 10 + 8 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 14611413 + ... + 14706411.

It is an arithmetic number, because the mean of its divisors is an integer number (28710045000).

Almost surely, 2^{1392581981088} is an apocalyptic number.

1392581981088 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392581981088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2067123240000).

1392581981088 is an abundant number, since it is smaller than the sum of its proper divisors (2741664498912).

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

1392581981088 is a wasteful number, since it uses less digits than its factorization.

1392581981088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97251 (or 97240 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 63.

The spelling of 1392581981088 in words is "one trillion, three hundred ninety-two billion, five hundred eighty-one million, nine hundred eighty-one thousand, eighty-eight".