74234996521 has 9 divisors (see below), whose sum is σ = 86357214621. Its totient is φ = 63628362252.

The previous prime is 74234996513. The next prime is 74234996557. The reversal of 74234996521 is 12569943247.

The square root of 74234996521 is 272461.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 74234996521 - 2³ = 74234996513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74234996621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1887766 + ... + 1926688.

It is an arithmetic number, because the mean of its divisors is an integer number (9595246069).

Almost surely, 2^74234996521 is an apocalyptic number.

74234996521 is the 272461-st square number.

74234996521 is the 136231-st centered octagonal number.

It is an amenable number.

74234996521 is a deficient number, since it is larger than the sum of its proper divisors (12122218100).

74234996521 is an frugal number, since it uses more digits than its factorization.

74234996521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77860 (or 38930 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The spelling of 74234996521 in words is "seventy-four billion, two hundred thirty-four million, nine hundred ninety-six thousand, five hundred twenty-one".