51216500060 has 72 divisors (see below), whose sum is σ = 119392303968. Its totient is φ = 18439696000.

The previous prime is 51216500057. The next prime is 51216500063. The reversal of 51216500060 is 6000561215.

It is an interprime number because it is at equal distance from previous prime (51216500057) and next prime (51216500063).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51216500063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139649 + ... + 349191.

It is an arithmetic number, because the mean of its divisors is an integer number (1658226444).

Almost surely, 2^51216500060 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 51216500060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59696151984).

51216500060 is an abundant number, since it is smaller than the sum of its proper divisors (68175803908).

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

51216500060 is a wasteful number, since it uses less digits than its factorization.

51216500060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209675 (or 209662 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 51216500060 in words is "fifty-one billion, two hundred sixteen million, five hundred thousand, sixty".