77497797623 has 2 divisors, whose sum is σ = 77497797624. Its totient is φ = 77497797622.

The previous prime is 77497797581. The next prime is 77497797647. The reversal of 77497797623 is 32679779477.

It is a strong prime.

It is an emirp because it is prime and its reverse (32679779477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77497797623 - 2⁸ = 77497797367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77497793623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38748898811 + 38748898812.

It is an arithmetic number, because the mean of its divisors is an integer number (38748898812).

Almost surely, 2^77497797623 is an apocalyptic number.

77497797623 is a deficient number, since it is larger than the sum of its proper divisors (1).

77497797623 is an equidigital number, since it uses as much as digits as its factorization.

77497797623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196036848, while the sum is 68.

The spelling of 77497797623 in words is "seventy-seven billion, four hundred ninety-seven million, seven hundred ninety-seven thousand, six hundred twenty-three".