51335914992 has 80 divisors (see below), whose sum is σ = 138638388480. Its totient is φ = 16337857536.

The previous prime is 51335914991. The next prime is 51335915003. The reversal of 51335914992 is 29941953315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51335914991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561384 + ... + 646392.

It is an arithmetic number, because the mean of its divisors is an integer number (1732979856).

Almost surely, 2^51335914992 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 51335914992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69319194240).

51335914992 is an abundant number, since it is smaller than the sum of its proper divisors (87302473488).

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

51335914992 is a wasteful number, since it uses less digits than its factorization.

51335914992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85590 (or 85584 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 51.

The spelling of 51335914992 in words is "fifty-one billion, three hundred thirty-five million, nine hundred fourteen thousand, nine hundred ninety-two".