51236536620 has 96 divisors (see below), whose sum is σ = 147401452800. Its totient is φ = 13288230144.

The previous prime is 51236536607. The next prime is 51236536633. The reversal of 51236536620 is 2663563215.

It is an interprime number because it is at equal distance from previous prime (51236536607) and next prime (51236536633).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9452271 + ... + 9457689.

It is an arithmetic number, because the mean of its divisors is an integer number (1535431800).

Almost surely, 2^51236536620 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 51236536620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73700726400).

51236536620 is an abundant number, since it is smaller than the sum of its proper divisors (96164916180).

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

51236536620 is a wasteful number, since it uses less digits than its factorization.

51236536620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9727 (or 9725 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 51236536620 in words is "fifty-one billion, two hundred thirty-six million, five hundred thirty-six thousand, six hundred twenty".