51362203640 has 128 divisors (see below), whose sum is σ = 126968472000. Its totient is φ = 18544742400.

The previous prime is 51362203637. The next prime is 51362203681. The reversal of 51362203640 is 4630226315.

It is a junction number, because it is equal to n+sod(n) for n = 51362203597 and 51362203606.

It is a congruent number.

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, 48408710 + ... + 48409770.

Almost surely, 2^51362203640 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 51362203640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63484236000).

51362203640 is an abundant number, since it is smaller than the sum of its proper divisors (75606268360).

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

51362203640 is a wasteful number, since it uses less digits than its factorization.

51362203640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 51362203640 its reverse (4630226315), we get a palindrome (55992429955).

The spelling of 51362203640 in words is "fifty-one billion, three hundred sixty-two million, two hundred three thousand, six hundred forty".