51236388107520 has 2304 divisors, whose sum is σ = 213278220288000. Its totient is φ = 10177825996800.

The previous prime is 51236388107501. The next prime is 51236388107563. The reversal of 51236388107520 is 2570188363215.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 102678132231 + ... + 102678132729.

It is an arithmetic number, because the mean of its divisors is an integer number (92568672000).

Almost surely, 2^{51236388107520} 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 51236388107520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106639110144000).

51236388107520 is an abundant number, since it is smaller than the sum of its proper divisors (162041832180480).

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

51236388107520 is a wasteful number, since it uses less digits than its factorization.

51236388107520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 51236388107520 in words is "fifty-one trillion, two hundred thirty-six billion, three hundred eighty-eight million, one hundred seven thousand, five hundred twenty".