1372346043521 has 2 divisors, whose sum is σ = 1372346043522. Its totient is φ = 1372346043520.

The previous prime is 1372346043517. The next prime is 1372346043587. The reversal of 1372346043521 is 1253406432731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923446043521 + 448900000000 = 960961^2 + 670000^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372346043521 - 2² = 1372346043517 is a prime.

It is not a weakly prime, because it can be changed into another prime (1372346043421) 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 as a sum of consecutive naturals, namely, 686173021760 + 686173021761.

It is an arithmetic number, because the mean of its divisors is an integer number (686173021761).

Almost surely, 2^{1372346043521} is an apocalyptic number.

It is an amenable number.

1372346043521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372346043521 is an equidigital number, since it uses as much as digits as its factorization.

1372346043521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 1372346043521 in words is "one trillion, three hundred seventy-two billion, three hundred forty-six million, forty-three thousand, five hundred twenty-one".