51939110780928 has 1920 divisors, whose sum is σ = 191356558747200. Its totient is φ = 13975318167552.

The previous prime is 51939110780891. The next prime is 51939110780929. The reversal of 51939110780928 is 82908701193915.

51939110780928 is a `hidden beast` number, since 51 + 9 + 391 + 107 + 8 + 0 + 92 + 8 = 666.

It is a super-2 number, since 2×51939110780928² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51939110780929) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 177266589550 + ... + 177266589842.

Almost surely, 2^{51939110780928} is an apocalyptic number.

51939110780928 is a gapful number since it is divisible by the number (58) 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 51939110780928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95678279373600).

51939110780928 is an abundant number, since it is smaller than the sum of its proper divisors (139417447966272).

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

51939110780928 is an equidigital number, since it uses as much as digits as its factorization.

51939110780928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 51939110780928 in words is "fifty-one trillion, nine hundred thirty-nine billion, one hundred ten million, seven hundred eighty thousand, nine hundred twenty-eight".