74138817648 has 80 divisors (see below), whose sum is σ = 223016011776. Its totient is φ = 20782844160.

The previous prime is 74138817631. The next prime is 74138817721. The reversal of 74138817648 is 84671883147.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2063808 + ... + 2099423.

Almost surely, 2^74138817648 is an apocalyptic number.

It is an amenable number.

74138817648 is an abundant number, since it is smaller than the sum of its proper divisors (148877194128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74138817648 is a wasteful number, since it uses less digits than its factorization.

74138817648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163302 (or 4163296 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 57.

The spelling of 74138817648 in words is "seventy-four billion, one hundred thirty-eight million, eight hundred seventeen thousand, six hundred forty-eight".