137851777277 has 4 divisors (see below), whose sum is σ = 138081914400. Its totient is φ = 137621640156.

The previous prime is 137851777267. The next prime is 137851777289. The reversal of 137851777277 is 772777158731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 772777158731 = 44683 ⋅17294657.

It is a cyclic number.

It is not a de Polignac number, because 137851777277 - 2²² = 137847582973 is a prime.

It is a super-4 number, since 4×137851777277⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137851777247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115067663 + ... + 115068860.

It is an arithmetic number, because the mean of its divisors is an integer number (34520478600).

Almost surely, 2^137851777277 is an apocalyptic number.

It is an amenable number.

137851777277 is a deficient number, since it is larger than the sum of its proper divisors (230137123).

137851777277 is an equidigital number, since it uses as much as digits as its factorization.

137851777277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230137122.

The product of its digits is 28235760, while the sum is 62.

The spelling of 137851777277 in words is "one hundred thirty-seven billion, eight hundred fifty-one million, seven hundred seventy-seven thousand, two hundred seventy-seven".