43781604577313 has 2 divisors, whose sum is σ = 43781604577314. Its totient is φ = 43781604577312.

The previous prime is 43781604577301. The next prime is 43781604577439. The reversal of 43781604577313 is 31377540618734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37897234781329 + 5884369795984 = 6156073^2 + 2425772^2 .

It is a cyclic number.

It is not a de Polignac number, because 43781604577313 - 2¹⁰ = 43781604576289 is a prime.

It is not a weakly prime, because it can be changed into another prime (43781604579313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890802288656 + 21890802288657.

It is an arithmetic number, because the mean of its divisors is an integer number (21890802288657).

Almost surely, 2^{43781604577313} is an apocalyptic number.

It is an amenable number.

43781604577313 is a deficient number, since it is larger than the sum of its proper divisors (1).

43781604577313 is an equidigital number, since it uses as much as digits as its factorization.

43781604577313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35562240, while the sum is 59.

The spelling of 43781604577313 in words is "forty-three trillion, seven hundred eighty-one billion, six hundred four million, five hundred seventy-seven thousand, three hundred thirteen".