51022261636 has 24 divisors (see below), whose sum is σ = 94550614200. Its totient is φ = 24008097792.

The previous prime is 51022261621. The next prime is 51022261637. The reversal of 51022261636 is 63616222015.

51022261636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14606172736 + 36416088900 = 120856^2 + 190830^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (51022261637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788196 + ... + 850468.

It is an arithmetic number, because the mean of its divisors is an integer number (3939608925).

Almost surely, 2^51022261636 is an apocalyptic number.

It is an amenable number.

51022261636 is a deficient number, since it is larger than the sum of its proper divisors (43528352564).

51022261636 is a wasteful number, since it uses less digits than its factorization.

51022261636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74343 (or 74341 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 51022261636 in words is "fifty-one billion, twenty-two million, two hundred sixty-one thousand, six hundred thirty-six".