138593966450 has 12 divisors (see below), whose sum is σ = 257784777690. Its totient is φ = 55437586560.

The previous prime is 138593966417. The next prime is 138593966509. The reversal of 138593966450 is 54669395831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 67807639201 + 70786327249 = 260399^2 + 266057^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138593966450.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1385939615 + ... + 1385939714.

Almost surely, 2^138593966450 is an apocalyptic number.

138593966450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138593966450 is a deficient number, since it is larger than the sum of its proper divisors (119190811240).

138593966450 is a wasteful number, since it uses less digits than its factorization.

138593966450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771879341 (or 2771879336 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 59.

The spelling of 138593966450 in words is "one hundred thirty-eight billion, five hundred ninety-three million, nine hundred sixty-six thousand, four hundred fifty".