74378272978 has 8 divisors (see below), whose sum is σ = 114582744972. Its totient is φ = 36184024656.

The previous prime is 74378272967. The next prime is 74378272981. The reversal of 74378272978 is 87927287347.

It can be written as a sum of positive squares in 2 ways, for example, as 54518981049 + 19859291929 = 233493^2 + 140923^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502555825 + ... + 502555972.

Almost surely, 2^74378272978 is an apocalyptic number.

74378272978 is a deficient number, since it is larger than the sum of its proper divisors (40204471994).

74378272978 is a wasteful number, since it uses less digits than its factorization.

74378272978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005111836.

The product of its digits is 66382848, while the sum is 64.

It can be divided in two parts, 7437 and 8272978, that added together give a triangular number (8280415 = T₄₀₆₉).

The spelling of 74378272978 in words is "seventy-four billion, three hundred seventy-eight million, two hundred seventy-two thousand, nine hundred seventy-eight".