1231708385280 has 416 divisors, whose sum is σ = 4162894237440. Its totient is φ = 310082273280.

The previous prime is 1231708385221. The next prime is 1231708385291. The reversal of 1231708385280 is 825838071321.

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 31 ways as a sum of consecutive naturals, for example, 365381995 + ... + 365385365.

Almost surely, 2^{1231708385280} is an apocalyptic number.

1231708385280 is a gapful number since it is divisible by the number (10) 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 1231708385280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081447118720).

1231708385280 is an abundant number, since it is smaller than the sum of its proper divisors (2931185852160).

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

1231708385280 is a wasteful number, since it uses less digits than its factorization.

1231708385280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735 (or 3713 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 1231708385280 in words is "one trillion, two hundred thirty-one billion, seven hundred eight million, three hundred eighty-five thousand, two hundred eighty".