54639009866 has 12 divisors (see below), whose sum is σ = 95339496978. Its totient is φ = 23416718472.

The previous prime is 54639009863. The next prime is 54639009877. The reversal of 54639009866 is 66890093645.

It can be written as a sum of positive squares in only one way, i.e., 32933175625 + 21705834241 = 181475^2 + 147329^2 .

It is not an unprimeable number, because it can be changed into a prime (54639009863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278770361 + ... + 278770556.

Almost surely, 2^54639009866 is an apocalyptic number.

54639009866 is a deficient number, since it is larger than the sum of its proper divisors (40700487112).

54639009866 is a wasteful number, since it uses less digits than its factorization.

54639009866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557540933 (or 557540926 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 54639009866 in words is "fifty-four billion, six hundred thirty-nine million, nine thousand, eight hundred sixty-six".