55564643831378 has 32 divisors (see below), whose sum is σ = 95116117536000. Its totient is φ = 24111740033920.

The previous prime is 55564643831363. The next prime is 55564643831381. The reversal of 55564643831378 is 87313834646555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489223658 + ... + 489337221.

It is an arithmetic number, because the mean of its divisors is an integer number (2972378673000).

Almost surely, 2^{55564643831378} is an apocalyptic number.

55564643831378 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55564643831378 is a deficient number, since it is larger than the sum of its proper divisors (39551473704622).

55564643831378 is a wasteful number, since it uses less digits than its factorization.

55564643831378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978561010.

The product of its digits is 870912000, while the sum is 68.

The spelling of 55564643831378 in words is "fifty-five trillion, five hundred sixty-four billion, six hundred forty-three million, eight hundred thirty-one thousand, three hundred seventy-eight".