74517581923 has 2 divisors, whose sum is σ = 74517581924. Its totient is φ = 74517581922.

The previous prime is 74517581909. The next prime is 74517581933. The reversal of 74517581923 is 32918571547.

It is a strong prime.

It is an emirp because it is prime and its reverse (32918571547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74517581923 - 2¹⁷ = 74517450851 is a prime.

It is not a weakly prime, because it can be changed into another prime (74517581933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37258790961 + 37258790962.

It is an arithmetic number, because the mean of its divisors is an integer number (37258790962).

Almost surely, 2^74517581923 is an apocalyptic number.

74517581923 is a deficient number, since it is larger than the sum of its proper divisors (1).

74517581923 is an equidigital number, since it uses as much as digits as its factorization.

74517581923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 52.

The spelling of 74517581923 in words is "seventy-four billion, five hundred seventeen million, five hundred eighty-one thousand, nine hundred twenty-three".