74320577545 has 8 divisors (see below), whose sum is σ = 89409342024. Its totient is φ = 59306696064.

The previous prime is 74320577453. The next prime is 74320577563. The reversal of 74320577545 is 54577502347.

It can be written as a sum of positive squares in 4 ways, for example, as 13672157184 + 60648420361 = 116928^2 + 246269^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 74320577545 - 2¹⁵ = 74320544777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18718564 + ... + 18722533.

It is an arithmetic number, because the mean of its divisors is an integer number (11176167753).

Almost surely, 2^74320577545 is an apocalyptic number.

It is an amenable number.

74320577545 is a deficient number, since it is larger than the sum of its proper divisors (15088764479).

74320577545 is a wasteful number, since it uses less digits than its factorization.

74320577545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37441499.

The product of its (nonzero) digits is 4116000, while the sum is 49.

The spelling of 74320577545 in words is "seventy-four billion, three hundred twenty million, five hundred seventy-seven thousand, five hundred forty-five".