74327555123649 has 63 divisors (see below), whose sum is σ = 116504640516817. Its totient is φ = 47393867476296.

The previous prime is 74327555123621. The next prime is 74327555123669. The reversal of 74327555123649 is 94632155572347.

The square root of 74327555123649 is 8621343.

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

74327555123649 is a `hidden beast` number, since 7 + 4 + 3 + 2 + 7 + 5 + 551 + 2 + 36 + 49 = 666.

It is not a de Polignac number, because 74327555123649 - 2⁹ = 74327555123137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74327555123669) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 5353847062 + ... + 5353860944.

Almost surely, 2^{74327555123649} is an apocalyptic number.

74327555123649 is the 8621343-rd square number.

74327555123649 is the 4310672-nd centered octagonal number.

It is an amenable number.

74327555123649 is a deficient number, since it is larger than the sum of its proper divisors (42177085393168).

74327555123649 is an frugal number, since it uses more digits than its factorization.

74327555123649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27830 (or 13909 counting only the distinct ones).

The product of its digits is 190512000, while the sum is 63.

The spelling of 74327555123649 in words is "seventy-four trillion, three hundred twenty-seven billion, five hundred fifty-five million, one hundred twenty-three thousand, six hundred forty-nine".