77400736771 has 2 divisors, whose sum is σ = 77400736772. Its totient is φ = 77400736770.

The previous prime is 77400736747. The next prime is 77400736781. The reversal of 77400736771 is 17763700477.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77400736771 - 2⁵ = 77400736739 is a prime.

It is not a weakly prime, because it can be changed into another prime (77400736781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38700368385 + 38700368386.

It is an arithmetic number, because the mean of its divisors is an integer number (38700368386).

Almost surely, 2^77400736771 is an apocalyptic number.

77400736771 is a deficient number, since it is larger than the sum of its proper divisors (1).

77400736771 is an equidigital number, since it uses as much as digits as its factorization.

77400736771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1210104, while the sum is 49.

The spelling of 77400736771 in words is "seventy-seven billion, four hundred million, seven hundred thirty-six thousand, seven hundred seventy-one".