73178420111 has 2 divisors, whose sum is σ = 73178420112. Its totient is φ = 73178420110.

The previous prime is 73178420057. The next prime is 73178420129. The reversal of 73178420111 is 11102487137.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73178420111 - 2⁶ = 73178420047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73178420141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36589210055 + 36589210056.

It is an arithmetic number, because the mean of its divisors is an integer number (36589210056).

Almost surely, 2^73178420111 is an apocalyptic number.

73178420111 is a deficient number, since it is larger than the sum of its proper divisors (1).

73178420111 is an equidigital number, since it uses as much as digits as its factorization.

73178420111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 35.

The spelling of 73178420111 in words is "seventy-three billion, one hundred seventy-eight million, four hundred twenty thousand, one hundred eleven".