43690690626257 has 2 divisors, whose sum is σ = 43690690626258. Its totient is φ = 43690690626256.

The previous prime is 43690690626239. The next prime is 43690690626277. The reversal of 43690690626257 is 75262609609634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42707322887056 + 983367739201 = 6535084^2 + 991649^2 .

It is a cyclic number.

It is not a de Polignac number, because 43690690626257 - 2³⁴ = 43673510757073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43690690626193 and 43690690626202.

It is not a weakly prime, because it can be changed into another prime (43690690626277) 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, 21845345313128 + 21845345313129.

It is an arithmetic number, because the mean of its divisors is an integer number (21845345313129).

Almost surely, 2^{43690690626257} is an apocalyptic number.

It is an amenable number.

43690690626257 is a deficient number, since it is larger than the sum of its proper divisors (1).

43690690626257 is an equidigital number, since it uses as much as digits as its factorization.

43690690626257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176359680, while the sum is 65.

The spelling of 43690690626257 in words is "forty-three trillion, six hundred ninety billion, six hundred ninety million, six hundred twenty-six thousand, two hundred fifty-seven".