43542764491 has 2 divisors, whose sum is σ = 43542764492. Its totient is φ = 43542764490.

The previous prime is 43542764477. The next prime is 43542764549. The reversal of 43542764491 is 19446724534.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43542764491 - 2¹⁷ = 43542633419 is a prime.

It is a super-4 number, since 4×43542764491⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not a weakly prime, because it can be changed into another prime (43542764431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21771382245 + 21771382246.

It is an arithmetic number, because the mean of its divisors is an integer number (21771382246).

Almost surely, 2^43542764491 is an apocalyptic number.

43542764491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43542764491 is an equidigital number, since it uses as much as digits as its factorization.

43542764491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 49.

The spelling of 43542764491 in words is "forty-three billion, five hundred forty-two million, seven hundred sixty-four thousand, four hundred ninety-one".