745468705595021 has 2 divisors, whose sum is σ = 745468705595022. Its totient is φ = 745468705595020.

The previous prime is 745468705594999. The next prime is 745468705595147. The reversal of 745468705595021 is 120595507864547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637579165108900 + 107889540486121 = 25250330^2 + 10386989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745468705595021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745468705595221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372734352797510 + 372734352797511.

It is an arithmetic number, because the mean of its divisors is an integer number (372734352797511).

Almost surely, 2^{745468705595021} is an apocalyptic number.

It is an amenable number.

745468705595021 is a deficient number, since it is larger than the sum of its proper divisors (1).

745468705595021 is an equidigital number, since it uses as much as digits as its factorization.

745468705595021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360000, while the sum is 68.

The spelling of 745468705595021 in words is "seven hundred forty-five trillion, four hundred sixty-eight billion, seven hundred five million, five hundred ninety-five thousand, twenty-one".