51870035138481 has 48 divisors (see below), whose sum is σ = 88393770849280. Its totient is φ = 28682302279680.

The previous prime is 51870035138461. The next prime is 51870035138513. The reversal of 51870035138481 is 18483153007815.

51870035138481 is a `hidden beast` number, since 5 + 1 + 87 + 0 + 0 + 3 + 51 + 38 + 481 = 666.

It is not a de Polignac number, because 51870035138481 - 2⁶ = 51870035138417 is a prime.

It is a super-2 number, since 2×51870035138481² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51870035138461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34992321 + ... + 36444513.

Almost surely, 2^{51870035138481} is an apocalyptic number.

It is an amenable number.

51870035138481 is a deficient number, since it is larger than the sum of its proper divisors (36523735710799).

51870035138481 is a wasteful number, since it uses less digits than its factorization.

51870035138481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470526 (or 1470523 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 51870035138481 in words is "fifty-one trillion, eight hundred seventy billion, thirty-five million, one hundred thirty-eight thousand, four hundred eighty-one".