63774731137 has 12 divisors (see below), whose sum is σ = 69128707500. Its totient is φ = 58808575488.

The previous prime is 63774731117. The next prime is 63774731149. The reversal of 63774731137 is 73113747736.

It can be written as a sum of positive squares in 6 ways, for example, as 2448666256 + 61326064881 = 49484^2 + 247641^2 .

It is a de Polignac number, because none of the positive numbers 2^k-63774731137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63774731117) 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 11 ways as a sum of consecutive naturals, for example, 28012 + ... + 358237.

It is an arithmetic number, because the mean of its divisors is an integer number (5760725625).

Almost surely, 2^63774731137 is an apocalyptic number.

It is an amenable number.

63774731137 is a deficient number, since it is larger than the sum of its proper divisors (5353976363).

63774731137 is a wasteful number, since it uses less digits than its factorization.

63774731137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387252 (or 387239 counting only the distinct ones).

The product of its digits is 1555848, while the sum is 49.

The spelling of 63774731137 in words is "sixty-three billion, seven hundred seventy-four million, seven hundred thirty-one thousand, one hundred thirty-seven".