51514345520 has 80 divisors (see below), whose sum is σ = 130894934688. Its totient is φ = 18698680320.

The previous prime is 51514345507. The next prime is 51514345529. The reversal of 51514345520 is 2554341515.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (51514345529) 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, 437612 + ... + 542708.

Almost surely, 2^51514345520 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 51514345520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65447467344).

51514345520 is an abundant number, since it is smaller than the sum of its proper divisors (79380589168).

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

51514345520 is a wasteful number, since it uses less digits than its factorization.

51514345520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105678 (or 105672 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 51514345520 in words is "fifty-one billion, five hundred fourteen million, three hundred forty-five thousand, five hundred twenty".