77405625533 has 2 divisors, whose sum is σ = 77405625534. Its totient is φ = 77405625532.

The previous prime is 77405625509. The next prime is 77405625559. The reversal of 77405625533 is 33552650477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76719028324 + 686597209 = 276982^2 + 26203^2 .

It is a cyclic number.

It is not a de Polignac number, because 77405625533 - 2⁸ = 77405625277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77405625503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38702812766 + 38702812767.

It is an arithmetic number, because the mean of its divisors is an integer number (38702812767).

Almost surely, 2^77405625533 is an apocalyptic number.

It is an amenable number.

77405625533 is a deficient number, since it is larger than the sum of its proper divisors (1).

77405625533 is an equidigital number, since it uses as much as digits as its factorization.

77405625533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646000, while the sum is 47.

The spelling of 77405625533 in words is "seventy-seven billion, four hundred five million, six hundred twenty-five thousand, five hundred thirty-three".