77874840833 has 2 divisors, whose sum is σ = 77874840834. Its totient is φ = 77874840832.

The previous prime is 77874840781. The next prime is 77874840851. The reversal of 77874840833 is 33804847877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77293452289 + 581388544 = 278017^2 + 24112^2 .

It is a cyclic number.

It is not a de Polignac number, because 77874840833 - 2¹⁸ = 77874578689 is a prime.

It is not a weakly prime, because it can be changed into another prime (77874840893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38937420416 + 38937420417.

It is an arithmetic number, because the mean of its divisors is an integer number (38937420417).

Almost surely, 2^77874840833 is an apocalyptic number.

It is an amenable number.

77874840833 is a deficient number, since it is larger than the sum of its proper divisors (1).

77874840833 is an equidigital number, since it uses as much as digits as its factorization.

77874840833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25288704, while the sum is 59.

The spelling of 77874840833 in words is "seventy-seven billion, eight hundred seventy-four million, eight hundred forty thousand, eight hundred thirty-three".