97778062771 has 2 divisors, whose sum is σ = 97778062772. Its totient is φ = 97778062770.

The previous prime is 97778062729. The next prime is 97778062787. The reversal of 97778062771 is 17726087779.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97778062771 - 2⁹ = 97778062259 is a prime.

It is not a weakly prime, because it can be changed into another prime (97778062871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48889031385 + 48889031386.

It is an arithmetic number, because the mean of its divisors is an integer number (48889031386).

Almost surely, 2^97778062771 is an apocalyptic number.

97778062771 is a deficient number, since it is larger than the sum of its proper divisors (1).

97778062771 is an equidigital number, since it uses as much as digits as its factorization.

97778062771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14521248, while the sum is 61.

The spelling of 97778062771 in words is "ninety-seven billion, seven hundred seventy-eight million, sixty-two thousand, seven hundred seventy-one".