51266934240 has 96 divisors (see below), whose sum is σ = 161741422080. Its totient is φ = 13649969664.

The previous prime is 51266934227. The next prime is 51266934269. The reversal of 51266934240 is 4243966215.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 51266934192 and 51266934201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228021 + ... + 393099.

It is an arithmetic number, because the mean of its divisors is an integer number (1684806480).

Almost surely, 2^51266934240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51266934240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80870711040).

51266934240 is an abundant number, since it is smaller than the sum of its proper divisors (110474487840).

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

51266934240 is a wasteful number, since it uses less digits than its factorization.

51266934240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165744 (or 165736 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 51266934240 in words is "fifty-one billion, two hundred sixty-six million, nine hundred thirty-four thousand, two hundred forty".