74538568778 has 8 divisors (see below), whose sum is σ = 112520005572. Its totient is φ = 37031900256.

The previous prime is 74538568777. The next prime is 74538568837. The reversal of 74538568778 is 87786583547.

It can be written as a sum of positive squares in 2 ways, for example, as 64829816689 + 9708752089 = 254617^2 + 98533^2 .

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

It is not an unprimeable number, because it can be changed into a prime (74538568777) 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, 118691675 + ... + 118692302.

Almost surely, 2^74538568778 is an apocalyptic number.

74538568778 is a deficient number, since it is larger than the sum of its proper divisors (37981436794).

74538568778 is a wasteful number, since it uses less digits than its factorization.

74538568778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237384136.

The product of its digits is 316108800, while the sum is 68.

The spelling of 74538568778 in words is "seventy-four billion, five hundred thirty-eight million, five hundred sixty-eight thousand, seven hundred seventy-eight".