51313246698 has 128 divisors (see below), whose sum is σ = 125076897792. Its totient is φ = 13716907776.

The previous prime is 51313246693. The next prime is 51313246711. The reversal of 51313246698 is 89664231315.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51313246693) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19095511 + ... + 19098197.

It is an arithmetic number, because the mean of its divisors is an integer number (977163264).

Almost surely, 2^51313246698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51313246698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62538448896).

51313246698 is an abundant number, since it is smaller than the sum of its proper divisors (73763651094).

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

51313246698 is a wasteful number, since it uses less digits than its factorization.

51313246698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its digits is 933120, while the sum is 48.

The spelling of 51313246698 in words is "fifty-one billion, three hundred thirteen million, two hundred forty-six thousand, six hundred ninety-eight".