51938679249 has 32 divisors (see below), whose sum is σ = 78138103680. Its totient is φ = 34093224000.

The previous prime is 51938679211. The next prime is 51938679269. The reversal of 51938679249 is 94297683915.

51938679249 is a `hidden beast` number, since 5 + 1 + 9 + 386 + 7 + 9 + 249 = 666.

51938679249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51938679249 - 2⁸ = 51938678993 is a prime.

It is a super-3 number, since 3×51938679249³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51938679269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 440974 + ... + 546200.

It is an arithmetic number, because the mean of its divisors is an integer number (2441815740).

Almost surely, 2^51938679249 is an apocalyptic number.

It is an amenable number.

51938679249 is a deficient number, since it is larger than the sum of its proper divisors (26199424431).

51938679249 is a wasteful number, since it uses less digits than its factorization.

51938679249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105518 (or 105512 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 51938679249 in words is "fifty-one billion, nine hundred thirty-eight million, six hundred seventy-nine thousand, two hundred forty-nine".