1357968719521 has 8 divisors (see below), whose sum is σ = 1472918726664. Its totient is φ = 1246915322880.

The previous prime is 1357968719509. The next prime is 1357968719539. The reversal of 1357968719521 is 1259178697531.

It can be written as a sum of positive squares in 4 ways, for example, as 12923142400 + 1345045577121 = 113680^2 + 1159761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1357968719521 - 2⁵ = 1357968719489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1357968719621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974151900 + ... + 974153293.

It is an arithmetic number, because the mean of its divisors is an integer number (184114840833).

Almost surely, 2^{1357968719521} is an apocalyptic number.

It is an amenable number.

1357968719521 is a deficient number, since it is larger than the sum of its proper divisors (114950007143).

1357968719521 is a wasteful number, since it uses less digits than its factorization.

1357968719521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948305251.

The product of its digits is 28576800, while the sum is 64.

The spelling of 1357968719521 in words is "one trillion, three hundred fifty-seven billion, nine hundred sixty-eight million, seven hundred nineteen thousand, five hundred twenty-one".