51906765924 has 384 divisors, whose sum is σ = 160736808960. Its totient is φ = 14347653120.

The previous prime is 51906765863. The next prime is 51906765959. The reversal of 51906765924 is 42956760915.

51906765924 is a `hidden beast` number, since 519 + 0 + 6 + 76 + 59 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 711051552 + ... + 711051624.

It is an arithmetic number, because the mean of its divisors is an integer number (418585440).

Almost surely, 2^51906765924 is an apocalyptic number.

51906765924 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51906765924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80368404480).

51906765924 is an abundant number, since it is smaller than the sum of its proper divisors (108830043036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51906765924 is a wasteful number, since it uses less digits than its factorization.

51906765924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 51906765924 in words is "fifty-one billion, nine hundred six million, seven hundred sixty-five thousand, nine hundred twenty-four".