137506261447 has 4 divisors (see below), whose sum is σ = 137714289736. Its totient is φ = 137298233160.

The previous prime is 137506261411. The next prime is 137506261471. The reversal of 137506261447 is 744162605731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137506261447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137506261397 and 137506261406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137506261547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104013153 + ... + 104014474.

It is an arithmetic number, because the mean of its divisors is an integer number (34428572434).

Almost surely, 2^137506261447 is an apocalyptic number.

137506261447 is a deficient number, since it is larger than the sum of its proper divisors (208028289).

137506261447 is an equidigital number, since it uses as much as digits as its factorization.

137506261447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208028288.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 137506261447 in words is "one hundred thirty-seven billion, five hundred six million, two hundred sixty-one thousand, four hundred forty-seven".