51911268000 has 768 divisors, whose sum is σ = 193603737600. Its totient is φ = 12080332800.

The previous prime is 51911267963. The next prime is 51911268001. The reversal of 51911268000 is 86211915.

It is not an unprimeable number, because it can be changed into a prime (51911268001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 228683887 + ... + 228684113.

It is an arithmetic number, because the mean of its divisors is an integer number (252088200).

Almost surely, 2^51911268000 is an apocalyptic number.

51911268000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51911268000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96801868800).

51911268000 is an abundant number, since it is smaller than the sum of its proper divisors (141692469600).

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

51911268000 is a wasteful number, since it uses less digits than its factorization.

51911268000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 33.

Adding to 51911268000 its reverse (86211915), we get a palindrome (51997479915).

The spelling of 51911268000 in words is "fifty-one billion, nine hundred eleven million, two hundred sixty-eight thousand".