55191067431838 has 24 divisors (see below), whose sum is σ = 90467090940600. Its totient is φ = 25239104920224.

The previous prime is 55191067431781. The next prime is 55191067431881. The reversal of 55191067431838 is 83813476019155.

55191067431838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 748986928 + ... + 749060611.

It is an arithmetic number, because the mean of its divisors is an integer number (3769462122525).

Almost surely, 2^{55191067431838} is an apocalyptic number.

55191067431838 is a deficient number, since it is larger than the sum of its proper divisors (35276023508762).

55191067431838 is a wasteful number, since it uses less digits than its factorization.

55191067431838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498047676 (or 1498047663 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 55191067431838 in words is "fifty-five trillion, one hundred ninety-one billion, sixty-seven million, four hundred thirty-one thousand, eight hundred thirty-eight".