74645254647 has 64 divisors (see below), whose sum is σ = 119380800000. Its totient is φ = 45942163200.

The previous prime is 74645254633. The next prime is 74645254669.

74645254647 is a `hidden beast` number, since 7 + 4 + 6 + 4 + 52 + 546 + 47 = 666.

74645254647 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74645254647 - 2⁴ = 74645254631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74645254593 and 74645254602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74645254687) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27152229 + ... + 27154977.

It is an arithmetic number, because the mean of its divisors is an integer number (1865325000).

Almost surely, 2^74645254647 is an apocalyptic number.

74645254647 is a deficient number, since it is larger than the sum of its proper divisors (44735545353).

74645254647 is a wasteful number, since it uses less digits than its factorization.

74645254647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109 (or 4103 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 54.

The spelling of 74645254647 in words is "seventy-four billion, six hundred forty-five million, two hundred fifty-four thousand, six hundred forty-seven".