51144313636 has 48 divisors (see below), whose sum is σ = 96898065264. Its totient is φ = 23480211456.

The previous prime is 51144313621. The next prime is 51144313681. The reversal of 51144313636 is 63631344115.

It can be written as a sum of positive squares in 8 ways, for example, as 27625536 + 51116688100 = 5256^2 + 226090^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51144313595 and 51144313604.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19541800 + ... + 19544416.

It is an arithmetic number, because the mean of its divisors is an integer number (2018709693).

Almost surely, 2^51144313636 is an apocalyptic number.

It is an amenable number.

51144313636 is a deficient number, since it is larger than the sum of its proper divisors (45753751628).

51144313636 is a wasteful number, since it uses less digits than its factorization.

51144313636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480 (or 4478 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The spelling of 51144313636 in words is "fifty-one billion, one hundred forty-four million, three hundred thirteen thousand, six hundred thirty-six".