77105531123 has 2 divisors, whose sum is σ = 77105531124. Its totient is φ = 77105531122.

The previous prime is 77105531059. The next prime is 77105531159. The reversal of 77105531123 is 32113550177.

It is a strong prime.

It is an emirp because it is prime and its reverse (32113550177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77105531123 - 2⁶ = 77105531059 is a prime.

It is a super-2 number, since 2×77105531123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77105537123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38552765561 + 38552765562.

It is an arithmetic number, because the mean of its divisors is an integer number (38552765562).

Almost surely, 2^77105531123 is an apocalyptic number.

77105531123 is a deficient number, since it is larger than the sum of its proper divisors (1).

77105531123 is an equidigital number, since it uses as much as digits as its factorization.

77105531123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22050, while the sum is 35.

The spelling of 77105531123 in words is "seventy-seven billion, one hundred five million, five hundred thirty-one thousand, one hundred twenty-three".