142138256950 has 12 divisors (see below), whose sum is σ = 264377158020. Its totient is φ = 56855302760.

The previous prime is 142138256947. The next prime is 142138256959. The reversal of 142138256950 is 59652831241.

It is a self number, because there is not a number n which added to its sum of digits gives 142138256950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142138256959) 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, 1421382520 + ... + 1421382619.

It is an arithmetic number, because the mean of its divisors is an integer number (22031429835).

Almost surely, 2^142138256950 is an apocalyptic number.

142138256950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142138256950 is a deficient number, since it is larger than the sum of its proper divisors (122238901070).

142138256950 is a wasteful number, since it uses less digits than its factorization.

142138256950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842765151 (or 2842765146 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 142138256950 in words is "one hundred forty-two billion, one hundred thirty-eight million, two hundred fifty-six thousand, nine hundred fifty".