139288915550 has 24 divisors (see below), whose sum is σ = 259277254896. Its totient is φ = 55672583040.

The previous prime is 139288915547. The next prime is 139288915567. The reversal of 139288915550 is 55519882931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1009082 + ... + 1138781.

It is an arithmetic number, because the mean of its divisors is an integer number (10803218954).

Almost surely, 2^139288915550 is an apocalyptic number.

139288915550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139288915550 is a deficient number, since it is larger than the sum of its proper divisors (119988339346).

139288915550 is a wasteful number, since it uses less digits than its factorization.

139288915550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149172 (or 2149167 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 56.

The spelling of 139288915550 in words is "one hundred thirty-nine billion, two hundred eighty-eight million, nine hundred fifteen thousand, five hundred fifty".