137315381777 has 4 divisors (see below), whose sum is σ = 156931864896. Its totient is φ = 117698898660.

The previous prime is 137315381761. The next prime is 137315381779. The reversal of 137315381777 is 777183513731.

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: 777183513731 = 137 ⋅5672872363.

It is not a de Polignac number, because 137315381777 - 2⁴ = 137315381761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137315381779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9808241549 + ... + 9808241562.

It is an arithmetic number, because the mean of its divisors is an integer number (39232966224).

Almost surely, 2^137315381777 is an apocalyptic number.

It is an amenable number.

137315381777 is a deficient number, since it is larger than the sum of its proper divisors (19616483119).

137315381777 is an equidigital number, since it uses as much as digits as its factorization.

137315381777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19616483118.

The product of its digits is 2593080, while the sum is 53.

The spelling of 137315381777 in words is "one hundred thirty-seven billion, three hundred fifteen million, three hundred eighty-one thousand, seven hundred seventy-seven".