51252606612 has 72 divisors (see below), whose sum is σ = 133362605376. Its totient is φ = 16586889984.

The previous prime is 51252606557. The next prime is 51252606631. The reversal of 51252606612 is 21660625215.

51252606612 is a `hidden beast` number, since 5 + 12 + 5 + 26 + 0 + 6 + 612 = 666.

It is a super-2 number, since 2×51252606612² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159388 + ... + 357644.

It is an arithmetic number, because the mean of its divisors is an integer number (1852258408).

Almost surely, 2^51252606612 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 51252606612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66681302688).

51252606612 is an abundant number, since it is smaller than the sum of its proper divisors (82109998764).

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

51252606612 is a wasteful number, since it uses less digits than its factorization.

51252606612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198477 (or 198472 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 51252606612 in words is "fifty-one billion, two hundred fifty-two million, six hundred six thousand, six hundred twelve".