2154255635378 has 48 divisors (see below), whose sum is σ = 4242082363200. Its totient is φ = 810378283680.

The previous prime is 2154255635353. The next prime is 2154255635381. The reversal of 2154255635378 is 8735365524512.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34423598 + ... + 34486121.

It is an arithmetic number, because the mean of its divisors is an integer number (88376715900).

Almost surely, 2^{2154255635378} is an apocalyptic number.

2154255635378 is a deficient number, since it is larger than the sum of its proper divisors (2087826727822).

2154255635378 is a wasteful number, since it uses less digits than its factorization.

2154255635378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68909775 (or 68909768 counting only the distinct ones).

The product of its digits is 30240000, while the sum is 56.

The spelling of 2154255635378 in words is "two trillion, one hundred fifty-four billion, two hundred fifty-five million, six hundred thirty-five thousand, three hundred seventy-eight".