137851777247 has 2 divisors, whose sum is σ = 137851777248. Its totient is φ = 137851777246.

The previous prime is 137851777187. The next prime is 137851777253. The reversal of 137851777247 is 742777158731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137851777247 - 2⁶ = 137851777183 is a prime.

It is a super-4 number, since 4×137851777247⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137851777267) 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 as a sum of consecutive naturals, namely, 68925888623 + 68925888624.

It is an arithmetic number, because the mean of its divisors is an integer number (68925888624).

Almost surely, 2^137851777247 is an apocalyptic number.

137851777247 is a deficient number, since it is larger than the sum of its proper divisors (1).

137851777247 is an equidigital number, since it uses as much as digits as its factorization.

137851777247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16134720, while the sum is 59.

The spelling of 137851777247 in words is "one hundred thirty-seven billion, eight hundred fifty-one million, seven hundred seventy-seven thousand, two hundred forty-seven".