54551287638 has 24 divisors (see below), whose sum is σ = 124415218200. Its totient is φ = 17226722304.

The previous prime is 54551287631. The next prime is 54551287727. The reversal of 54551287638 is 83678215545.

54551287638 is a `hidden beast` number, since 5 + 4 + 551 + 2 + 87 + 6 + 3 + 8 = 666.

54551287638 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 not an unprimeable number, because it can be changed into a prime (54551287631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79753003 + ... + 79753686.

It is an arithmetic number, because the mean of its divisors is an integer number (5183967425).

Almost surely, 2^54551287638 is an apocalyptic number.

54551287638 is an abundant number, since it is smaller than the sum of its proper divisors (69863930562).

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

54551287638 is a wasteful number, since it uses less digits than its factorization.

54551287638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159506716 (or 159506713 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 54551287638 in words is "fifty-four billion, five hundred fifty-one million, two hundred eighty-seven thousand, six hundred thirty-eight".