51902635680 has 960 divisors, whose sum is σ = 217241595648. Its totient is φ = 11426365440.

The previous prime is 51902635649. The next prime is 51902635703. The reversal of 51902635680 is 8653620915.

51902635680 is a `hidden beast` number, since 5 + 1 + 9 + 0 + 2 + 635 + 6 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 459315304 + ... + 459315416.

Almost surely, 2^51902635680 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 51902635680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108620797824).

51902635680 is an abundant number, since it is smaller than the sum of its proper divisors (165338959968).

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

51902635680 is a wasteful number, since it uses less digits than its factorization.

51902635680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 51902635680 in words is "fifty-one billion, nine hundred two million, six hundred thirty-five thousand, six hundred eighty".