43195054649 has 2 divisors, whose sum is σ = 43195054650. Its totient is φ = 43195054648.

The previous prime is 43195054627. The next prime is 43195054723. The reversal of 43195054649 is 94645059134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39191329024 + 4003725625 = 197968^2 + 63275^2 .

It is a cyclic number.

It is not a de Polignac number, because 43195054649 - 2¹⁶ = 43194989113 is a prime.

It is a super-2 number, since 2×43195054649² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43195054597 and 43195054606.

It is not a weakly prime, because it can be changed into another prime (43195054249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597527324 + 21597527325.

It is an arithmetic number, because the mean of its divisors is an integer number (21597527325).

Almost surely, 2^43195054649 is an apocalyptic number.

It is an amenable number.

43195054649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43195054649 is an equidigital number, since it uses as much as digits as its factorization.

43195054649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 43195054649 in words is "forty-three billion, one hundred ninety-five million, fifty-four thousand, six hundred forty-nine".