1243206610320 has 160 divisors (see below), whose sum is σ = 3942737648640. Its totient is φ = 323950620160.

The previous prime is 1243206610307. The next prime is 1243206610339. The reversal of 1243206610320 is 230166023421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2101855 + ... + 2627585.

It is an arithmetic number, because the mean of its divisors is an integer number (24642110304).

Almost surely, 2^{1243206610320} is an apocalyptic number.

1243206610320 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 1243206610320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971368824320).

1243206610320 is an abundant number, since it is smaller than the sum of its proper divisors (2699531038320).

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

1243206610320 is a wasteful number, since it uses less digits than its factorization.

1243206610320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525973 (or 525967 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 1243206610320 in words is "one trillion, two hundred forty-three billion, two hundred six million, six hundred ten thousand, three hundred twenty".