50636686351381 has 4 divisors (see below), whose sum is σ = 54531816070732. Its totient is φ = 46741556632032.

The previous prime is 50636686351369. The next prime is 50636686351397. The reversal of 50636686351381 is 18315368663605.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11882264008356 + 38754422343025 = 3447066^2 + 6225305^2 .

It is a cyclic number.

It is not a de Polignac number, because 50636686351381 - 2²¹ = 50636684254229 is a prime.

It is a super-2 number, since 2×50636686351381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50636686351981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1947564859656 + ... + 1947564859681.

It is an arithmetic number, because the mean of its divisors is an integer number (13632954017683).

Almost surely, 2^{50636686351381} is an apocalyptic number.

It is an amenable number.

50636686351381 is a deficient number, since it is larger than the sum of its proper divisors (3895129719351).

50636686351381 is a wasteful number, since it uses less digits than its factorization.

50636686351381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895129719350.

The product of its (nonzero) digits is 55987200, while the sum is 61.

The spelling of 50636686351381 in words is "fifty trillion, six hundred thirty-six billion, six hundred eighty-six million, three hundred fifty-one thousand, three hundred eighty-one".