1399188621792 has 192 divisors, whose sum is σ = 4260516212736. Its totient is φ = 398517166080.

The previous prime is 1399188621781. The next prime is 1399188621793. The reversal of 1399188621792 is 2971268819931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399188621793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103608 + ... + 1676040.

It is an arithmetic number, because the mean of its divisors is an integer number (22190188608).

Almost surely, 2^{1399188621792} is an apocalyptic number.

1399188621792 is a gapful number since it is divisible by the number (12) 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 1399188621792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130258106368).

1399188621792 is an abundant number, since it is smaller than the sum of its proper divisors (2861327590944).

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

1399188621792 is a wasteful number, since it uses less digits than its factorization.

1399188621792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572513 (or 1572505 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 66.

The spelling of 1399188621792 in words is "one trillion, three hundred ninety-nine billion, one hundred eighty-eight million, six hundred twenty-one thousand, seven hundred ninety-two".