74680688749 has 4 divisors (see below), whose sum is σ = 74847015900. Its totient is φ = 74514361600.

The previous prime is 74680688737. The next prime is 74680688779. The reversal of 74680688749 is 94788608647.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37756376100 + 36924312649 = 194310^2 + 192157^2 .

It is a cyclic number.

It is not a de Polignac number, because 74680688749 - 2⁵ = 74680688717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74680688779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83162902 + ... + 83163799.

It is an arithmetic number, because the mean of its divisors is an integer number (18711753975).

Almost surely, 2^74680688749 is an apocalyptic number.

It is an amenable number.

74680688749 is a deficient number, since it is larger than the sum of its proper divisors (166327151).

74680688749 is a wasteful number, since it uses less digits than its factorization.

74680688749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166327150.

The product of its (nonzero) digits is 130056192, while the sum is 67.

The spelling of 74680688749 in words is "seventy-four billion, six hundred eighty million, six hundred eighty-eight thousand, seven hundred forty-nine".