51138167279 has 8 divisors (see below), whose sum is σ = 54652336848. Its totient is φ = 47680224640.

The previous prime is 51138167239. The next prime is 51138167287. The reversal of 51138167279 is 97276183115.

It is a happy number.

51138167279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51138167279 - 2²⁸ = 50869731823 is a prime.

It is a super-2 number, since 2×51138167279² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51138167239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14054852 + ... + 14058489.

It is an arithmetic number, because the mean of its divisors is an integer number (6831542106).

Almost surely, 2^51138167279 is an apocalyptic number.

51138167279 is a deficient number, since it is larger than the sum of its proper divisors (3514169569).

51138167279 is a wasteful number, since it uses less digits than its factorization.

51138167279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28113465.

The product of its digits is 635040, while the sum is 50.

The spelling of 51138167279 in words is "fifty-one billion, one hundred thirty-eight million, one hundred sixty-seven thousand, two hundred seventy-nine".