138726604801 has 4 divisors (see below), whose sum is σ = 138795590704. Its totient is φ = 138657618900.

The previous prime is 138726604763. The next prime is 138726604879. The reversal of 138726604801 is 108406627831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138726604801 - 2²⁵ = 138693050369 is a prime.

It is a super-2 number, since 2×138726604801² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138726604301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34489935 + ... + 34493956.

It is an arithmetic number, because the mean of its divisors is an integer number (34698897676).

It is a Proth number, since it is equal to 33075 ⋅ 2²² + 1 and 33075 < 2²².

Almost surely, 2^138726604801 is an apocalyptic number.

It is an amenable number.

138726604801 is a deficient number, since it is larger than the sum of its proper divisors (68985903).

138726604801 is an equidigital number, since it uses as much as digits as its factorization.

138726604801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68985902.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 138726604801 in words is "one hundred thirty-eight billion, seven hundred twenty-six million, six hundred four thousand, eight hundred one".