51266699999136 has 288 divisors, whose sum is σ = 148997768092992. Its totient is φ = 16717248737280.

The previous prime is 51266699999117. The next prime is 51266699999149. The reversal of 51266699999136 is 63199999666215.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×51266699999136² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1299747031 + ... + 1299786473.

It is an arithmetic number, because the mean of its divisors is an integer number (517353361434).

Almost surely, 2^{51266699999136} 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 51266699999136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74498884046496).

51266699999136 is an abundant number, since it is smaller than the sum of its proper divisors (97731068093856).

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

51266699999136 is a wasteful number, since it uses less digits than its factorization.

51266699999136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40036 (or 40025 counting only the distinct ones).

The product of its digits is 2295825120, while the sum is 81.

The spelling of 51266699999136 in words is "fifty-one trillion, two hundred sixty-six billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred thirty-six".