139278720001 has 4 divisors (see below), whose sum is σ = 139298587092. Its totient is φ = 139258852912.

The previous prime is 139278719971. The next prime is 139278720013. The reversal of 139278720001 is 100027872931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125868848400 + 13409871601 = 354780^2 + 115801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139278720001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139278720101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9923026 + ... + 9937051.

It is an arithmetic number, because the mean of its divisors is an integer number (34824646773).

Almost surely, 2^139278720001 is an apocalyptic number.

It is an amenable number.

139278720001 is a deficient number, since it is larger than the sum of its proper divisors (19867091).

139278720001 is an equidigital number, since it uses as much as digits as its factorization.

139278720001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19867090.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 139278720001 in words is "one hundred thirty-nine billion, two hundred seventy-eight million, seven hundred twenty thousand, one".