77420453633 has 2 divisors, whose sum is σ = 77420453634. Its totient is φ = 77420453632.

The previous prime is 77420453611. The next prime is 77420453657. The reversal of 77420453633 is 33635402477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77096741569 + 323712064 = 277663^2 + 17992^2 .

It is a cyclic number.

It is not a de Polignac number, because 77420453633 - 2²⁴ = 77403676417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (77420653633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38710226816 + 38710226817.

It is an arithmetic number, because the mean of its divisors is an integer number (38710226817).

Almost surely, 2^77420453633 is an apocalyptic number.

It is an amenable number.

77420453633 is a deficient number, since it is larger than the sum of its proper divisors (1).

77420453633 is an equidigital number, since it uses as much as digits as its factorization.

77420453633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 44.

The spelling of 77420453633 in words is "seventy-seven billion, four hundred twenty million, four hundred fifty-three thousand, six hundred thirty-three".