43261304786957 has 2 divisors, whose sum is σ = 43261304786958. Its totient is φ = 43261304786956.

The previous prime is 43261304786951. The next prime is 43261304786969. The reversal of 43261304786957 is 75968740316234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33211777117156 + 10049527669801 = 5762966^2 + 3170099^2 .

It is a cyclic number.

It is not a de Polignac number, because 43261304786957 - 2³⁶ = 43192585310221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43261304786893 and 43261304786902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43261304786951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21630652393478 + 21630652393479.

It is an arithmetic number, because the mean of its divisors is an integer number (21630652393479).

It is a 2-persistent number, because it is pandigital, and so is 2⋅43261304786957 = 86522609573914, but 3⋅43261304786957 = 129783914360871 is not.

Almost surely, 2^{43261304786957} is an apocalyptic number.

It is an amenable number.

43261304786957 is a deficient number, since it is larger than the sum of its proper divisors (1).

43261304786957 is an equidigital number, since it uses as much as digits as its factorization.

43261304786957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 65.

The spelling of 43261304786957 in words is "forty-three trillion, two hundred sixty-one billion, three hundred four million, seven hundred eighty-six thousand, nine hundred fifty-seven".