3778238888655 has 96 divisors (see below), whose sum is σ = 7718503903488. Its totient is φ = 1560543667200.

The previous prime is 3778238888617. The next prime is 3778238888687. The reversal of 3778238888655 is 5568888328773.

It is not a de Polignac number, because 3778238888655 - 2⁹ = 3778238888143 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 115626 + ... + 2751335.

It is an arithmetic number, because the mean of its divisors is an integer number (80401082328).

Almost surely, 2^{3778238888655} is an apocalyptic number.

3778238888655 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3778238888655 is an abundant number, since it is smaller than the sum of its proper divisors (3940265014833).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3778238888655 is a wasteful number, since it uses less digits than its factorization.

3778238888655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867157 (or 2867150 counting only the distinct ones).

The product of its digits is 4335206400, while the sum is 78.

The spelling of 3778238888655 in words is "three trillion, seven hundred seventy-eight billion, two hundred thirty-eight million, eight hundred eighty-eight thousand, six hundred fifty-five".