43264019078261 has 2 divisors, whose sum is σ = 43264019078262. Its totient is φ = 43264019078260.

The previous prime is 43264019078221. The next prime is 43264019078303. The reversal of 43264019078261 is 16287091046234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33438809716900 + 9825209361361 = 5782630^2 + 3134519^2 .

It is a cyclic number.

It is not a de Polignac number, because 43264019078261 - 2¹⁴ = 43264019061877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43264019078221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21632009539130 + 21632009539131.

It is an arithmetic number, because the mean of its divisors is an integer number (21632009539131).

Almost surely, 2^{43264019078261} is an apocalyptic number.

It is an amenable number.

43264019078261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43264019078261 is an equidigital number, since it uses as much as digits as its factorization.

43264019078261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 43264019078261 in words is "forty-three trillion, two hundred sixty-four billion, nineteen million, seventy-eight thousand, two hundred sixty-one".