139003279550 has 48 divisors (see below), whose sum is σ = 270639008352. Its totient is φ = 53015952000.

The previous prime is 139003279543. The next prime is 139003279553. The reversal of 139003279550 is 55972300931.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139003279553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173900 + ... + 555200.

It is an arithmetic number, because the mean of its divisors is an integer number (5638312674).

Almost surely, 2^139003279550 is an apocalyptic number.

139003279550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139003279550 is a deficient number, since it is larger than the sum of its proper divisors (131635728802).

139003279550 is a wasteful number, since it uses less digits than its factorization.

139003279550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381653 (or 381648 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 44.

The spelling of 139003279550 in words is "one hundred thirty-nine billion, three million, two hundred seventy-nine thousand, five hundred fifty".