3378955221638 has 4 divisors (see below), whose sum is σ = 5068432832460. Its totient is φ = 1689477610818.

The previous prime is 3378955221619. The next prime is 3378955221661. The reversal of 3378955221638 is 8361225598733.

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

It is a super-2 number, since 2×3378955221638² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844738805408 + ... + 844738805411.

It is an arithmetic number, because the mean of its divisors is an integer number (1267108208115).

Almost surely, 2^{3378955221638} is an apocalyptic number.

3378955221638 is a deficient number, since it is larger than the sum of its proper divisors (1689477610822).

3378955221638 is a wasteful number, since it uses less digits than its factorization.

3378955221638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689477610821.

The product of its digits is 65318400, while the sum is 62.

The spelling of 3378955221638 in words is "three trillion, three hundred seventy-eight billion, nine hundred fifty-five million, two hundred twenty-one thousand, six hundred thirty-eight".