73145919923 has 2 divisors, whose sum is σ = 73145919924. Its totient is φ = 73145919922.

The previous prime is 73145919911. The next prime is 73145919967. The reversal of 73145919923 is 32991954137.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73145919923 - 2¹⁸ = 73145657779 is a prime.

It is not a weakly prime, because it can be changed into another prime (73145916923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36572959961 + 36572959962.

It is an arithmetic number, because the mean of its divisors is an integer number (36572959962).

Almost surely, 2^73145919923 is an apocalyptic number.

73145919923 is a deficient number, since it is larger than the sum of its proper divisors (1).

73145919923 is an equidigital number, since it uses as much as digits as its factorization.

73145919923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The spelling of 73145919923 in words is "seventy-three billion, one hundred forty-five million, nine hundred nineteen thousand, nine hundred twenty-three".