3278905956538 has 4 divisors (see below), whose sum is σ = 4918358934810. Its totient is φ = 1639452978268.

The previous prime is 3278905956481. The next prime is 3278905956593. The reversal of 3278905956538 is 8356595098723.

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

It can be written as a sum of positive squares in only one way, i.e., 2957481591289 + 321424365249 = 1719733^2 + 566943^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819726489133 + ... + 819726489136.

Almost surely, 2^{3278905956538} is an apocalyptic number.

3278905956538 is a deficient number, since it is larger than the sum of its proper divisors (1639452978272).

3278905956538 is a wasteful number, since it uses less digits than its factorization.

3278905956538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639452978271.

The product of its (nonzero) digits is 489888000, while the sum is 70.

The spelling of 3278905956538 in words is "three trillion, two hundred seventy-eight billion, nine hundred five million, nine hundred fifty-six thousand, five hundred thirty-eight".