51960865698 has 192 divisors, whose sum is σ = 136197734400. Its totient is φ = 14003798400.

The previous prime is 51960865673. The next prime is 51960865711. The reversal of 51960865698 is 89656806915.

51960865698 is a `hidden beast` number, since 5 + 1 + 9 + 60 + 8 + 6 + 569 + 8 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64069713 + ... + 64070523.

It is an arithmetic number, because the mean of its divisors is an integer number (709363200).

Almost surely, 2^51960865698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51960865698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68098867200).

51960865698 is an abundant number, since it is smaller than the sum of its proper divisors (84236868702).

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

51960865698 is a wasteful number, since it uses less digits than its factorization.

51960865698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 51960865698 in words is "fifty-one billion, nine hundred sixty million, eight hundred sixty-five thousand, six hundred ninety-eight".