51318364436 has 12 divisors (see below), whose sum is σ = 89825180928. Its totient is φ = 25654027032.

The previous prime is 51318364411. The next prime is 51318364439. The reversal of 51318364436 is 63446381315.

It is a super-2 number, since 2×51318364436² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51318364439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266356 + ... + 1306251.

It is an arithmetic number, because the mean of its divisors is an integer number (7485431744).

Almost surely, 2^51318364436 is an apocalyptic number.

It is an amenable number.

51318364436 is a deficient number, since it is larger than the sum of its proper divisors (38506816492).

51318364436 is a wasteful number, since it uses less digits than its factorization.

51318364436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577598 (or 2577596 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The spelling of 51318364436 in words is "fifty-one billion, three hundred eighteen million, three hundred sixty-four thousand, four hundred thirty-six".