74216553699409 has 81 divisors (see below), whose sum is σ = 90634579136059. Its totient is φ = 60709566037120.

The previous prime is 74216553699347. The next prime is 74216553699413. The reversal of 74216553699409 is 90499635561247.

The square root of 74216553699409 is 8614903.

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

It can be written as a sum of positive squares in only one way, i.e., 57781053918225 + 16435499781184 = 7601385^2 + 4054072^2 .

It is not a de Polignac number, because 74216553699409 - 2¹¹ = 74216553697361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74216553699809) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 37052696802 + ... + 37052698804.

Almost surely, 2^{74216553699409} is an apocalyptic number.

74216553699409 is the 8614903-rd square number.

74216553699409 is the 4307452-nd centered octagonal number.

It is an amenable number.

74216553699409 is a deficient number, since it is larger than the sum of its proper divisors (16418025436650).

74216553699409 is an equidigital number, since it uses as much as digits as its factorization.

74216553699409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 440899200, while the sum is 70.

The spelling of 74216553699409 in words is "seventy-four trillion, two hundred sixteen billion, five hundred fifty-three million, six hundred ninety-nine thousand, four hundred nine".