77770000831 has 2 divisors, whose sum is σ = 77770000832. Its totient is φ = 77770000830.

The previous prime is 77770000811. The next prime is 77770000837. The reversal of 77770000831 is 13800007777.

It is a strong prime.

It is an emirp because it is prime and its reverse (13800007777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77770000831 - 2⁷ = 77770000703 is a prime.

It is a super-2 number, since 2×77770000831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77770000837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38885000415 + 38885000416.

It is an arithmetic number, because the mean of its divisors is an integer number (38885000416).

Almost surely, 2^77770000831 is an apocalyptic number.

77770000831 is a deficient number, since it is larger than the sum of its proper divisors (1).

77770000831 is an equidigital number, since it uses as much as digits as its factorization.

77770000831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 40.

The spelling of 77770000831 in words is "seventy-seven billion, seven hundred seventy million, eight hundred thirty-one", and thus it is an aban number.