74540645 has 8 divisors (see below), whose sum is σ = 89840760. Its totient is φ = 59371200.

The previous prime is 74540639. The next prime is 74540651. The reversal of 74540645 is 54604547.

74540645 = T₃₂₆ + T₃₂₇ + ... + T₇₈₃.

It is an interprime number because it is at equal distance from previous prime (74540639) and next prime (74540651).

It can be written as a sum of positive squares in 4 ways, for example, as 36372961 + 38167684 = 6031^2 + 6178^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74540645 - 2⁶ = 74540581 is a prime.

It is a super-3 number, since 3×74540645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 31406 + ... + 33695.

It is an arithmetic number, because the mean of its divisors is an integer number (11230095).

Almost surely, 2^74540645 is an apocalyptic number.

It is an amenable number.

74540645 is a deficient number, since it is larger than the sum of its proper divisors (15300115).

74540645 is a wasteful number, since it uses less digits than its factorization.

74540645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65335.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 74540645 is about 8633.6924313992. The cubic root of 74540645 is about 420.8536022217.

The spelling of 74540645 in words is "seventy-four million, five hundred forty thousand, six hundred forty-five".