74283602640 has 80 divisors (see below), whose sum is σ = 247992960768. Its totient is φ = 18285193728.

The previous prime is 74283602633. The next prime is 74283602647. The reversal of 74283602640 is 4620638247.

It is an interprime number because it is at equal distance from previous prime (74283602633) and next prime (74283602647).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 74283602592 and 74283602601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74283602647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11901304 + ... + 11907543.

Almost surely, 2^74283602640 is an apocalyptic number.

It is an amenable number.

74283602640 is an abundant number, since it is smaller than the sum of its proper divisors (173709358128).

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

74283602640 is a wasteful number, since it uses less digits than its factorization.

74283602640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23808876 (or 23808870 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 74283602640 in words is "seventy-four billion, two hundred eighty-three million, six hundred two thousand, six hundred forty".