139996635890 has 8 divisors (see below), whose sum is σ = 251993944620. Its totient is φ = 55998654352.

The previous prime is 139996635881. The next prime is 139996635949. The reversal of 139996635890 is 98536699931.

It can be written as a sum of positive squares in 2 ways, for example, as 137894138281 + 2102497609 = 371341^2 + 45853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139996635890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6999831785 + ... + 6999831804.

Almost surely, 2^139996635890 is an apocalyptic number.

139996635890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139996635890 is a deficient number, since it is larger than the sum of its proper divisors (111997308730).

139996635890 is a wasteful number, since it uses less digits than its factorization.

139996635890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13999663596.

The product of its (nonzero) digits is 85030560, while the sum is 68.

The spelling of 139996635890 in words is "one hundred thirty-nine billion, nine hundred ninety-six million, six hundred thirty-five thousand, eight hundred ninety".