1351055721340 has 96 divisors (see below), whose sum is σ = 3235539525120. Its totient is φ = 469765806336.

The previous prime is 1351055721263. The next prime is 1351055721347. The reversal of 1351055721340 is 431275501531.

It is a self number, because there is not a number n which added to its sum of digits gives 1351055721340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351055721347) by changing a digit.

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, 6139 + ... + 1643821.

It is an arithmetic number, because the mean of its divisors is an integer number (33703536720).

Almost surely, 2^{1351055721340} is an apocalyptic number.

1351055721340 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 1351055721340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617769762560).

1351055721340 is an abundant number, since it is smaller than the sum of its proper divisors (1884483803780).

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

1351055721340 is a wasteful number, since it uses less digits than its factorization.

1351055721340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637891 (or 1637889 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 1351055721340 in words is "one trillion, three hundred fifty-one billion, fifty-five million, seven hundred twenty-one thousand, three hundred forty".