77545454443 has 2 divisors, whose sum is σ = 77545454444. Its totient is φ = 77545454442.

The previous prime is 77545454419. The next prime is 77545454461. The reversal of 77545454443 is 34445454577.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77545454443 is a prime.

It is not a weakly prime, because it can be changed into another prime (77545454543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38772727221 + 38772727222.

It is an arithmetic number, because the mean of its divisors is an integer number (38772727222).

Almost surely, 2^77545454443 is an apocalyptic number.

77545454443 is a deficient number, since it is larger than the sum of its proper divisors (1).

77545454443 is an equidigital number, since it uses as much as digits as its factorization.

77545454443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816000, while the sum is 52.

The spelling of 77545454443 in words is "seventy-seven billion, five hundred forty-five million, four hundred fifty-four thousand, four hundred forty-three".